function fn_fprintmatrix(fid, M, nrows, ncols, indxFloat)
% Prints the matrix to an ascii file indexed by fid.
%
% Inputs:
%   fid:  Ascii file id.  Example:  fid = fopen('outdatainp_3s_stv_tvms6lags.prn','a');
%   M:  The matrix to be written to the file.
%   nrows:  Number of rows of M.
%   ncols:  Number of columns of M.
%   indxFloat:  1 if float; 0 if integer.
%
for ki=1:nrows
   for kj=1:ncols
      if indxFloat
         fprintf(fid,' %20.15f ',M((kj-1)*nrows+ki));
      else
         fprintf(fid,' %d ',M((kj-1)*nrows+ki));
      end
      if (kj==ncols)
         fprintf(fid,'\n');
      end
   end
   if (ki==nrows)
      fprintf(fid,'\n\n');
   end
end