function cmd = sltpda_fixvar(cmd)

% SLTPDA_FIXVAR replaces various unwanted characters in variable names.
% 
% M Hewitson 11-04-07
% 
% $Id: sltpda_fixvar.m,v 1.2 2007/04/29 12:52:00 hewitson Exp $
% 

% some simple replacements
cmd = strrep(cmd, ' ', '_');
cmd = strrep(cmd, '-', '_');
cmd = strrep(cmd, '/', '_');
cmd = strrep(cmd, '.', '_');

% check variable name doesn't begin with number - MATLAB doesn't like this
if ~isempty(cmd)
  n = str2num(cmd(1));
  if ~isempty(n)
    if isreal(n)
      cmd = ['c' cmd];
    end
  end
end
% END