Added functionality to communicator for mpi operations on PLMD::Matrix

src/tools/Communicator.h

@@ -30,6 +30,7 @@
 #include <string>
 #include "Vector.h"
 #include "Tensor.h"
+#include "Matrix.h"
 
 namespace PLMD{
 
@@ -82,6 +83,11 @@ class Communicator{
       if(v.size()>0){ Data d(&v[0],v.size()); pointer=d.pointer; size=d.size; type=d.type; }
       else { pointer=NULL; size=0; }
     }
+/// Init from reference to PLMD::Matrix
+    template <typename T> Data(Matrix<T>&m ){
+      if(m.nrows()*m.ncols()>0){ Data d(&m(0,0),m.nrows()*m.ncols()); pointer=d.pointer; size=d.size; type=d.type; }
+      else{ pointer=NULL; size=0; } 
+    }
 /// Init from reference to std::string
     Data(std::string&s){
       if(s.size()>0){ Data d(&s[0],s.size()); pointer=d.pointer; size=d.size; type=d.type; }