From: Kathryn Iverson <kd.iverson@gmail.com>
Date: Tue, 15 May 2012 20:29:33 +0000 (-0400)
Subject: added functions to calculate standard deviation and zscore
X-Git-Url: https://git.donarmstrong.com/?p=mothur.git;a=commitdiff_plain;h=e4470c6d8ddc83db4e55a2c530e804920c62b855

added functions to calculate standard deviation and zscore
---

diff --git a/trialSwap2.cpp b/trialSwap2.cpp
index 2d25e83..1524890 100644
--- a/trialSwap2.cpp
+++ b/trialSwap2.cpp
@@ -291,6 +291,30 @@ double TrialSwap2::t_test (double initialscore, int runs, double nullMean, vecto
     }
 }
 /**************************************************************************************************/
+double TrialSwap2::getSD (int runs, vector<double> scorevec, double nullMean)
+{
+    double sum = 0;
+    for(int i=0;i<runs;i++)
+        {
+            if (m->control_pressed) { return 0; }
+            sum += pow((scorevec[i] - nullMean),2);
+        }
+    return sqrt( (1/runs) * sum );
+}
+/**************************************************************************************************/
+double TrialSwap2::get_zscore (double sd, double nullMean, double initscore)
+{
+    map<double, double> ztable;
+    
+    ztable["0.00"] = 0.5;
+    
+    double z;
+    
+    z = (initscore - nullMean) / sd;
+    
+    return z;
+}
+/**************************************************************************************************/
 int TrialSwap2::print_matrix(vector<vector<int> > &matrix, int nrows, int ncols)
 {
     try {
diff --git a/trialswap2.h b/trialswap2.h
index 924938b..4552219 100644
--- a/trialswap2.h
+++ b/trialswap2.h
@@ -26,6 +26,8 @@ public:
     double calc_vratio (int, int, vector<int>, vector<int>);
     int calc_checker (vector<vector<int> > &, vector<int>, int, int);
     double calc_c_score (vector<vector<int> > &, vector<int>, int, int);
+    double get_zscore (double, double, double);
+    double getSD (int, vector<double>, double);
     
     
 private:
@@ -35,7 +37,7 @@ private:
     int print_matrix(vector<vector<int> > &, int, int);
     
     
-    
+        
 };
 #endif