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changed how we do "smart" distancing
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1 /*
2  *  treegroupscommand.cpp
3  *  Mothur
4  *
5  *  Created by Sarah Westcott on 4/8/09.
6  *  Copyright 2009 Schloss Lab UMASS Amherst. All rights reserved.
7  *
8  */
9
10 #include "treegroupscommand.h"
11 #include "sharedjabund.h"
12 #include "sharedsorabund.h"
13 #include "sharedjclass.h"
14 #include "sharedsorclass.h"
15 #include "sharedjest.h"
16 #include "sharedsorest.h"
17 #include "sharedthetayc.h"
18 #include "sharedthetan.h"
19 #include "sharedmorisitahorn.h"
20 #include "sharedbraycurtis.h"
21
22
23 //**********************************************************************************************************************
24
25 TreeGroupCommand::TreeGroupCommand(string option){
26         try {
27                 globaldata = GlobalData::getInstance();
28                 abort = false;
29                 allLines = 1;
30                 lines.clear();
31                 labels.clear();
32                 Groups.clear();
33                 Estimators.clear();
34                 
35                 //allow user to run help
36                 if(option == "help") { validCalculator = new ValidCalculators(); help(); abort = true; }
37                 
38                 else {
39                         //valid paramters for this command
40                         string Array[] =  {"line","label","calc","groups", "phylip", "column", "name", "precision","cutoff"};
41                         vector<string> myArray (Array, Array+(sizeof(Array)/sizeof(string)));
42                         
43                         OptionParser parser(option);
44                         map<string, string> parameters = parser. getParameters();
45                         
46                         ValidParameters validParameter;
47                 
48                         //check to make sure all parameters are valid for command
49                         for (map<string, string>::iterator it = parameters.begin(); it != parameters.end(); it++) { 
50                                 if (validParameter.isValidParameter(it->first, myArray, it->second) != true) {  abort = true;  }
51                         }
52                         
53                         //required parameters
54                         phylipfile = validParameter.validFile(parameters, "phylip", true);
55                         if (phylipfile == "not open") { abort = true; }
56                         else if (phylipfile == "not found") { phylipfile = ""; }        
57                         else {  format = "phylip";      }
58                         
59                         columnfile = validParameter.validFile(parameters, "column", true);
60                         if (columnfile == "not open") { abort = true; } 
61                         else if (columnfile == "not found") { columnfile = ""; }
62                         else {  format = "column";      }
63                         
64                         namefile = validParameter.validFile(parameters, "name", true);
65                         if (namefile == "not open") { abort = true; }   
66                         else if (namefile == "not found") { namefile = ""; }
67                         else {  globaldata->setNameFile(namefile);      }
68                         
69                         format = globaldata->getFormat();
70                         
71                         //error checking on files                       
72                         if ((globaldata->getSharedFile() == "") && ((phylipfile == "") && (columnfile == "")))  { cout << "You must run the read.otu command or provide a distance file before running the tree.shared command." << endl; abort = true; }
73                         else if ((phylipfile != "") && (columnfile != "")) { cout << "When running the tree.shared command with a distance file you may not use both the column and the phylip parameters." << endl; abort = true; }
74                         
75                         if (columnfile != "") {
76                                 if (namefile == "") {  cout << "You need to provide a namefile if you are going to use the column format." << endl; abort = true; }
77                         }
78
79                         //check for optional parameter and set defaults
80                         // ...at some point should added some additional type checking...
81                         line = validParameter.validFile(parameters, "line", false);                             
82                         if (line == "not found") { line = "";  }
83                         else { 
84                                 if(line != "all") {  splitAtDash(line, lines);  allLines = 0;  }
85                                 else { allLines = 1;  }
86                         }
87                         
88                         label = validParameter.validFile(parameters, "label", false);                   
89                         if (label == "not found") { label = ""; }
90                         else { 
91                                 if(label != "all") {  splitAtDash(label, labels);  allLines = 0;  }
92                                 else { allLines = 1;  }
93                         }
94                         
95                         //make sure user did not use both the line and label parameters
96                         if ((line != "") && (label != "")) { cout << "You cannot use both the line and label parameters at the same time. " << endl; abort = true; }
97                         //if the user has not specified any line or labels use the ones from read.otu
98                         else if((line == "") && (label == "")) {  
99                                 allLines = globaldata->allLines; 
100                                 labels = globaldata->labels; 
101                                 lines = globaldata->lines;
102                         }
103                                 
104                         groups = validParameter.validFile(parameters, "groups", false);                 
105                         if (groups == "not found") { groups = ""; }
106                         else { 
107                                 splitAtDash(groups, Groups);
108                                 globaldata->Groups = Groups;
109                         }
110                                 
111                         calc = validParameter.validFile(parameters, "calc", false);                     
112                         if (calc == "not found") { calc = "jclass-thetayc";  }
113                         else { 
114                                  if (calc == "default")  {  calc = "jclass-thetayc";  }
115                         }
116                         splitAtDash(calc, Estimators);
117
118                         string temp;
119                         temp = validParameter.validFile(parameters, "precision", false);                        if (temp == "not found") { temp = "100"; }
120                         convert(temp, precision); 
121                         
122                         temp = validParameter.validFile(parameters, "cutoff", false);                   if (temp == "not found") { temp = "10"; }
123                         convert(temp, cutoff); 
124                         cutoff += (5 / (precision * 10.0));
125
126                                 
127                         if (abort == false) {
128                         
129                                 validCalculator = new ValidCalculators();
130                                 
131                                 if (format == "sharedfile") {
132                                         int i;
133                                         for (i=0; i<Estimators.size(); i++) {
134                                                 if (validCalculator->isValidCalculator("treegroup", Estimators[i]) == true) { 
135                                                         if (Estimators[i] == "jabund") {        
136                                                                 treeCalculators.push_back(new JAbund());
137                                                         }else if (Estimators[i] == "sorabund") { 
138                                                                 treeCalculators.push_back(new SorAbund());
139                                                         }else if (Estimators[i] == "jclass") { 
140                                                                 treeCalculators.push_back(new Jclass());
141                                                         }else if (Estimators[i] == "sorclass") { 
142                                                                 treeCalculators.push_back(new SorClass());
143                                                         }else if (Estimators[i] == "jest") { 
144                                                                 treeCalculators.push_back(new Jest());
145                                                         }else if (Estimators[i] == "sorest") { 
146                                                                 treeCalculators.push_back(new SorEst());
147                                                         }else if (Estimators[i] == "thetayc") { 
148                                                                 treeCalculators.push_back(new ThetaYC());
149                                                         }else if (Estimators[i] == "thetan") { 
150                                                                 treeCalculators.push_back(new ThetaN());
151                                                         }else if (Estimators[i] == "morisitahorn") { 
152                                                                 treeCalculators.push_back(new MorHorn());
153                                                         }else if (Estimators[i] == "braycurtis") { 
154                                                                 treeCalculators.push_back(new BrayCurtis());
155                                                         }
156                                                 }
157                                         }
158                                 }
159                         }       
160                 }
161
162         }
163         catch(exception& e) {
164                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function TreeGroupCommand. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
165                 exit(1);
166         }
167         catch(...) {
168                 cout << "An unknown error has occurred in the TreeGroupCommand class function TreeGroupCommand. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
169                 exit(1);
170         }       
171 }
172
173 //**********************************************************************************************************************
174
175 void TreeGroupCommand::help(){
176         try {
177                 cout << "The tree.shared command creates a .tre to represent the similiarity between groups or sequences." << "\n";
178                 cout << "The tree.shared command can only be executed after a successful read.otu command or by providing a distance file." << "\n";
179                 cout << "The tree.shared command parameters are groups, calc, phylip, column, name, cutoff, precision, line and label.  You may not use line and label at the same time." << "\n";
180                 cout << "The groups parameter allows you to specify which of the groups in your groupfile you would like included used." << "\n";
181                 cout << "The group names are separated by dashes. The line and label allow you to select what distance levels you would like trees created for, and are also separated by dashes." << "\n";
182                 cout << "The phylip or column parameter are required if you do not run the read.otu command first, and only one may be used.  If you use a column file the name filename is required. " << "\n";
183                 cout << "If you do not provide a cutoff value 10.00 is assumed. If you do not provide a precision value then 100 is assumed." << "\n";
184                 cout << "The tree.shared command should be in the following format: tree.shared(groups=yourGroups, calc=yourCalcs, line=yourLines, label=yourLabels)." << "\n";
185                 cout << "Example tree.shared(groups=A-B-C, line=1-3-5, calc=jabund-sorabund)." << "\n";
186                 cout << "The default value for groups is all the groups in your groupfile." << "\n";
187                 cout << "The default value for calc is jclass-thetayc." << "\n";
188                 cout << "The tree.shared command outputs a .tre file for each calculator you specify at each distance you choose." << "\n";
189                 validCalculator->printCalc("treegroup", cout);
190                 cout << "Or the tree.shared command can be in the following format: tree.shared(phylip=yourPhylipFile)." << "\n";
191                 cout << "Example tree.shared(phylip=abrecovery.dist)." << "\n";
192                 cout << "Note: No spaces between parameter labels (i.e. groups), '=' and parameters (i.e.yourGroups)." << "\n" << "\n";
193         }
194         catch(exception& e) {
195                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function help. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
196                 exit(1);
197         }
198         catch(...) {
199                 cout << "An unknown error has occurred in the TreeGroupCommand class function help. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
200                 exit(1);
201         }       
202 }
203
204
205 //**********************************************************************************************************************
206
207 TreeGroupCommand::~TreeGroupCommand(){
208         if (abort == false) {
209                 
210                 if (format == "sharedfile") { delete read;  delete input; globaldata->ginput = NULL;}
211                 else { delete readMatrix;  delete matrix; delete list; }
212                 delete tmap;
213                 delete validCalculator;
214         }
215         
216 }
217
218 //**********************************************************************************************************************
219
220 int TreeGroupCommand::execute(){
221         try {
222         
223                 if (abort == true) { return 0; }
224                 
225                 if (format == "sharedfile") {
226                         //if the users entered no valid calculators don't execute command
227                         if (treeCalculators.size() == 0) { cout << "You have given no valid calculators." << endl; return 0; }
228
229                         //you have groups
230                         read = new ReadOTUFile(globaldata->inputFileName);      
231                         read->read(&*globaldata); 
232                         
233                         input = globaldata->ginput;
234                         lookup = input->getSharedRAbundVectors();
235                         lastLabel = lookup[0]->getLabel();
236                         
237                         if (lookup.size() < 2) { cout << "You have not provided enough valid groups.  I cannot run the command." << endl; return 0; }
238                 
239                         globaldata->runParse = false;
240                         
241                         //create tree file
242                         makeSimsShared();
243                 }else{
244                         //read in dist file
245                         filename = globaldata->inputFileName;
246                 
247                         if (format == "column") { readMatrix = new ReadColumnMatrix(filename); }        
248                         else if (format == "phylip") { readMatrix = new ReadPhylipMatrix(filename); }
249                                 
250                         readMatrix->setCutoff(cutoff);
251         
252                         if(namefile != ""){     
253                                 nameMap = new NameAssignment(namefile);
254                                 nameMap->readMap();
255                         }
256                         else{
257                                 nameMap = NULL;
258                         }
259         
260                         readMatrix->read(nameMap);
261                         list = readMatrix->getListVector();
262                         matrix = readMatrix->getMatrix();
263
264                         //make treemap
265                         tmap = new TreeMap();
266                         tmap->makeSim(list);
267                         globaldata->gTreemap = tmap;
268                         
269                         globaldata->Groups = tmap->namesOfGroups;
270                 
271                         //clear globaldatas old tree names if any
272                         globaldata->Treenames.clear();
273                 
274                         //fills globaldatas tree names
275                         globaldata->Treenames = globaldata->Groups;
276                         
277                         globaldata->runParse = false;
278                         
279                         makeSimsDist();
280
281                         //create a new filename
282                         outputFile = getRootName(globaldata->inputFileName) + "tre";    
283                                 
284                         createTree();
285                         cout << "Tree complete. " << endl;
286                 }
287                                 
288                 //reset groups parameter
289                 globaldata->Groups.clear();  
290
291                 return 0;
292         }
293         catch(exception& e) {
294                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function execute. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
295                 exit(1);
296         }
297         catch(...) {
298                 cout << "An unknown error has occurred in the TreeGroupCommand class function execute. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
299                 exit(1);
300         }               
301 }
302 //**********************************************************************************************************************
303
304 void TreeGroupCommand::createTree(){
305         try {
306                 //create tree
307                 t = new Tree();
308                 
309                 //do merges and create tree structure by setting parents and children
310                 //there are numGroups - 1 merges to do
311                 for (int i = 0; i < (numGroups - 1); i++) {
312                         float largest = -1000.0;
313
314                         int row, column;
315                         //find largest value in sims matrix by searching lower triangle
316                         for (int j = 1; j < simMatrix.size(); j++) {
317                                 for (int k = 0; k < j; k++) {
318                                         if (simMatrix[j][k] > largest) {  largest = simMatrix[j][k]; row = j; column = k;  }
319                                 }
320                         }
321
322                         //set non-leaf node info and update leaves to know their parents
323                         //non-leaf
324                         t->tree[numGroups + i].setChildren(index[row], index[column]);
325                         
326                         //parents
327                         t->tree[index[row]].setParent(numGroups + i);
328                         t->tree[index[column]].setParent(numGroups + i);
329                         
330                         //blength = distance / 2;
331                         float blength = ((1.0 - largest) / 2);
332                         
333                         //branchlengths
334                         t->tree[index[row]].setBranchLength(blength - t->tree[index[row]].getLengthToLeaves());
335                         t->tree[index[column]].setBranchLength(blength - t->tree[index[column]].getLengthToLeaves());
336                         
337                         //set your length to leaves to your childs length plus branchlength
338                         t->tree[numGroups + i].setLengthToLeaves(t->tree[index[row]].getLengthToLeaves() + t->tree[index[row]].getBranchLength());
339                         
340                         
341                         //update index 
342                         index[row] = numGroups+i;
343                         index[column] = numGroups+i;
344                         
345                         //remove highest value that caused the merge.
346                         simMatrix[row][column] = -1000.0;
347                         simMatrix[column][row] = -1000.0;
348                         
349                         //merge values in simsMatrix
350                         for (int n = 0; n < simMatrix.size(); n++)      {
351                                 //row becomes merge of 2 groups
352                                 simMatrix[row][n] = (simMatrix[row][n] + simMatrix[column][n]) / 2;
353                                 simMatrix[n][row] = simMatrix[row][n];
354                                 //delete column
355                                 simMatrix[column][n] = -1000.0;
356                                 simMatrix[n][column] = -1000.0;
357                         }
358                 }
359                 
360                 //adjust tree to make sure root to tip length is .5
361                 int root = t->findRoot();
362                 t->tree[root].setBranchLength((0.5 - t->tree[root].getLengthToLeaves()));
363                 
364                 //assemble tree
365                 t->assembleTree();
366                 
367                 //print newick file
368                 t->createNewickFile(outputFile);
369                 
370                 //delete tree
371                 delete t;
372         
373         }
374         catch(exception& e) {
375                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function createTree. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
376                 exit(1);
377         }
378         catch(...) {
379                 cout << "An unknown error has occurred in the TreeGroupCommand class function createTree. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
380                 exit(1);
381         }
382 }
383 /***********************************************************/
384 void TreeGroupCommand::printSims(ostream& out) {
385         try {
386                 
387                 //output column headers
388                 //out << '\t';
389                 //for (int i = 0; i < lookup.size(); i++) {     out << lookup[i]->getGroup() << '\t';           }
390                 //out << endl;
391                 
392                 
393                 for (int m = 0; m < simMatrix.size(); m++)      {
394                         //out << lookup[m]->getGroup() << '\t';
395                         for (int n = 0; n < simMatrix.size(); n++)      {
396                                 out << simMatrix[m][n] << '\t'; 
397                         }
398                         out << endl;
399                 }
400
401         }
402         catch(exception& e) {
403                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function printSims. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
404                 exit(1);
405         }
406         catch(...) {
407                 cout << "An unknown error has occurred in the TreeGroupCommand class function printSims. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
408                 exit(1);
409         }               
410 }
411 /***********************************************************/
412 void TreeGroupCommand::makeSimsDist() {
413         try {
414                 numGroups = list->size();
415                 
416                 //initialize index
417                 index.clear();
418                 for (int g = 0; g < numGroups; g++) {   index[g] = g;   }
419                 
420                 //initialize simMatrix
421                 simMatrix.clear();
422                 simMatrix.resize(numGroups);
423                 for (int m = 0; m < simMatrix.size(); m++)      {
424                         for (int j = 0; j < simMatrix.size(); j++)      {
425                                 simMatrix[m].push_back(0.0);
426                         }
427                 }
428                 
429                 //go through sparse matrix and fill sims
430                 //go through each cell in the sparsematrix
431                 for(MatData currentCell = matrix->begin(); currentCell != matrix->end(); currentCell++){
432                         //similairity = -(distance-1)
433                         simMatrix[currentCell->row][currentCell->column] = -(currentCell->dist -1.0);   
434                         simMatrix[currentCell->column][currentCell->row] = -(currentCell->dist -1.0);                           
435                 }
436
437
438         }
439         catch(exception& e) {
440                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function makeSimsDist. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
441                 exit(1);
442         }
443         catch(...) {
444                 cout << "An unknown error has occurred in the TreeGroupCommand class function makeSimsDist. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
445                 exit(1);
446         }               
447 }
448
449 /***********************************************************/
450 void TreeGroupCommand::makeSimsShared() {
451         try {
452                 int count = 1;  
453         
454                 //clear globaldatas old tree names if any
455                 globaldata->Treenames.clear();
456                 
457                 //fills globaldatas tree names
458                 globaldata->Treenames = globaldata->Groups;
459                 
460                 //create treemap class from groupmap for tree class to use
461                 tmap = new TreeMap();
462                 tmap->makeSim(globaldata->gGroupmap);
463                 globaldata->gTreemap = tmap;
464                 
465                 set<string> processedLabels;
466                 set<string> userLabels = labels;
467                 set<int> userLines = lines;
468
469                 //as long as you are not at the end of the file or done wih the lines you want
470                 while((lookup[0] != NULL) && ((allLines == 1) || (userLabels.size() != 0) || (userLines.size() != 0))) {
471                 
472                         if(allLines == 1 || lines.count(count) == 1 || labels.count(lookup[0]->getLabel()) == 1){                       
473                                 cout << lookup[0]->getLabel() << '\t' << count << endl;
474                                 process(lookup);
475                                 
476                                 processedLabels.insert(lookup[0]->getLabel());
477                                 userLabels.erase(lookup[0]->getLabel());
478                                 userLines.erase(count);
479                         }
480                         
481                         if ((anyLabelsToProcess(lookup[0]->getLabel(), userLabels, "") == true) && (processedLabels.count(lastLabel) != 1)) {
482                                 for (int i = 0; i < lookup.size(); i++) {  delete lookup[i];  } 
483                                 lookup = input->getSharedRAbundVectors(lastLabel);
484
485                                 cout << lookup[0]->getLabel() << '\t' << count << endl;
486                                 process(lookup);
487                                         
488                                 processedLabels.insert(lookup[0]->getLabel());
489                                 userLabels.erase(lookup[0]->getLabel());
490                         }
491
492                         lastLabel = lookup[0]->getLabel();                      
493                         
494                         //get next line to process
495                         for (int i = 0; i < lookup.size(); i++) {  delete lookup[i];  } 
496                         lookup = input->getSharedRAbundVectors();
497                         count++;
498                 }
499                 
500                 //output error messages about any remaining user labels
501                 set<string>::iterator it;
502                 bool needToRun = false;
503                 for (it = userLabels.begin(); it != userLabels.end(); it++) {  
504                         cout << "Your file does not include the label "<< *it; 
505                         if (processedLabels.count(lastLabel) != 1) {
506                                 cout << ". I will use " << lastLabel << "." << endl;
507                                 needToRun = true;
508                         }else {
509                                 cout << ". Please refer to " << lastLabel << "." << endl;
510                         }
511                 }
512                 
513                 //run last line if you need to
514                 if (needToRun == true)  {
515                         for (int i = 0; i < lookup.size(); i++) {  delete lookup[i];  } 
516                         lookup = input->getSharedRAbundVectors(lastLabel);
517
518                         cout << lookup[0]->getLabel() << '\t' << count << endl;
519                         process(lookup);
520                         for (int i = 0; i < lookup.size(); i++) {  delete lookup[i];  }         
521                 }
522                 
523                 for(int i = 0 ; i < treeCalculators.size(); i++) {  delete treeCalculators[i]; }
524         }
525         catch(exception& e) {
526                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function makeSimsShared. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
527                 exit(1);
528         }
529         catch(...) {
530                 cout << "An unknown error has occurred in the TreeGroupCommand class function makeSimsShared. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
531                 exit(1);
532         }               
533 }
534
535 /***********************************************************/
536 void TreeGroupCommand::process(vector<SharedRAbundVector*> thisLookup) {
537         try{
538                                 EstOutput data;
539                                 vector<SharedRAbundVector*> subset;
540                                 numGroups = thisLookup.size();
541                                 
542                                 //for each calculator                                                                                           
543                                 for(int i = 0 ; i < treeCalculators.size(); i++) {
544                                         //initialize simMatrix
545                                         simMatrix.clear();
546                                         simMatrix.resize(numGroups);
547                                         for (int m = 0; m < simMatrix.size(); m++)      {
548                                                 for (int j = 0; j < simMatrix.size(); j++)      {
549                                                         simMatrix[m].push_back(0.0);
550                                                 }
551                                         }
552                 
553                                         //initialize index
554                                         index.clear();
555                                         for (int g = 0; g < numGroups; g++) {   index[g] = g;   }
556                 
557                                         //create a new filename
558                                         outputFile = getRootName(globaldata->inputFileName) + treeCalculators[i]->getName() + "." + thisLookup[0]->getLabel() + ".tre";                         
559                                                                                                 
560                                         for (int k = 0; k < thisLookup.size(); k++) { 
561                                                 for (int l = k; l < thisLookup.size(); l++) {
562                                                         if (k != l) { //we dont need to similiarity of a groups to itself
563                                                                 //get estimated similarity between 2 groups
564                                                                 
565                                                                 subset.clear(); //clear out old pair of sharedrabunds
566                                                                 //add new pair of sharedrabunds
567                                                                 subset.push_back(thisLookup[k]); subset.push_back(thisLookup[l]); 
568                                                                 
569                                                                 data = treeCalculators[i]->getValues(subset); //saves the calculator outputs
570                                                                 //save values in similarity matrix
571                                                                 simMatrix[k][l] = data[0];
572                                                                 simMatrix[l][k] = data[0];
573                                                         }
574                                                 }
575                                         }
576                                 
577                                         //creates tree from similarity matrix and write out file
578                                         createTree();
579                                 }
580
581         }
582         catch(exception& e) {
583                 cout << "Standard Error: " << e.what() << " has occurred in the TreeGroupCommand class Function process. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
584                 exit(1);
585         }
586         catch(...) {
587                 cout << "An unknown error has occurred in the TreeGroupCommand class function process. Please contact Pat Schloss at pschloss@microbio.umass.edu." << "\n";
588                 exit(1);
589         }               
590 }
591 /***********************************************************/
592
593         
594