//error checking on files
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; }
//error checking on files
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; }