function s=setformat(port,tmode)

%    SOSI-M2 V1.0 MATLAB M-file
%
% Set output format
%
% Arguments: setformat(port,tmode)
%
% port: 'COM2' for example
% tmode: one of 'clockT', 'indexT', 'none'
%
% 'clockT' sets first column data as time hh:mm:ss
%   data is 8 columns
% 'indexT' sets first column data as integer count nnnnnnn
%   data is 8 columns
% 'none' does not display x-axis data first column data
%   data is 7 columns

% Setup output format and check input argument
    if strcmpi(tmode,'clockT')
        s1='#seoc';
    elseif strcmpi(tmode,'indexT')
        s1='#seoi';
    elseif strcmpi(tmode,'none')
        s1='#seon';
    else
        disp('Argument error: tmode');
        return;
    end

try

% Set up port
    spo=serial9600(port);
    wakeupsub(spo);

    s=cmd(spo,s1,0.1);
    fclose(spo);
    return;

catch
    s=lasterr;
    disp(s);
    fclose(spo);
    return;
end