dialog box option instead of the input command

Hello

Here is a piece my code which takes an input file for analysis. The file itself(asig) has 10 million rows and two columns. The following input commands take the limits to scan the data.

[anasignal,path] = uigetfile('*.csv','Select the .csv file to analyze');
if isequal(anasignal,0)
   disp('User selected Cancel');
end
asig = csvread(fullfile(path, anasignal),15,0);
llimit = input('specify where you want to start panning?:');
ulimit = input('specify where you want to end panning?:');
aamp = asig(llimit:ulimit,2);%vary this to get more samples
ts = asig(2,1) - asig(1,1);%sampling rate calculated automatically
tim = [llimit-1:ulimit - 1]*ts;%vary this in accordance with aamp
time = tim';%transposed to get a column vector for plotting

Input command takes me to Matlab command prompt. Is there a way to get a dialog box/modal window instead which takes two values lower limit and upper limit and assigns it to llimit and ulimit?

Thanks

Answer 1

[Paulo Silva]

prompt = {'Enter ulimit:','Enter llimit:'};
dlg_title = 'Enter the limits';
num_lines = 1;
def = {'1','2'};  %default values for the inputs
answer = inputdlg(prompt,dlg_title,num_lines,def);
ErrStatus=0;
if isempty(answer)
    disp('User canceled the input')
    ErrStatus=1;
else
    if (strcmp(answer{1},'') | strcmp(answer{2},'')) %empty strings
        disp('Error: Empty inputs not allowed')
        ErrStatus=1;
    else
        ulimit=str2num(answer{1});
        llimit=str2num(answer{2});
    end
end

if isempty(ulimit) | isempty(llimit)   %empty array
    disp('Error: Empty inputs not allowed')
    ErrStatus=1;
end

%you might also need to verify the size of the inputs
if numel(ulimit)>1 | numel(llimit)>1   %empty array
    disp('Error: Arrays not allowed')
    ErrStatus=1;
end

%more verifications needed, values outside the range or zero

if ~ErrStatus  %values are good to be used
%insert your code here 
ulimit
llimit
end

Answer 2

[Walter Roberson]

It is possible to program such a thing, but it would not be considered good style as it would involve a called routine assigning values in the workspace of the caller.

You might want to have a look at http://www.mathworks.com/help/techdoc/ref/inputdlg.html