Matlab Mutiple Text Files, Plot

can anyone please help me with this questions?

I plotted multiple files using the two while loops in the Matlab Editor --> run,but when I tried to plot the files using GUI pushbutton, I got this error message for some of the files..

Error using plot Vectors must be the same length.

fid= fopen([FilesToRead, MultipleFiles]);

    Block=0;
    while true
        tLine = fgetl(fid);
        if ~ischar(tLine) 
           break;
        else
            headerCells = strsplit(tLine,' ');
            if length(headerCells) > 1
                if ~isempty(headerCells{2})
                    if ~strcmpi(headerCells{2},'!user') && ~strcmpi(headerCells{2},'data')
                        textForGUI = headerCells{2}
                    end
                end
            end
        end
        if ~isempty(strfind(tLine,'data'))  
          Block=Block+1;   
         fprintf('\n\nBlock: %s\n\n', num2str(Block));  
         formatSpec = '%f %f %f %f %f';       
         C = textscan(fid,formatSpec,24,'CommentStyle','data','Delimiter','\t');
         %here I got some calculations and plots

          % I have for loop to handles indexing

end

end

end

Answer 1

[Guillaume]

Well, the error message is very clear:

 Error using plot. Vectors must be the same length
 Error in [..] plot(Column4, CalcValue(:,1), '-rs');

Column4 and CalcValue(:, 1) are not the same length. That is the basic problem.

Note that if CalcValue has more than one column, then the line

Column4(end:end+numel(CalcValue)-numel(Column4))=nan;

is guaranteed to make Column4 longer than CalcValue(:, 1). Perhaps you meant:

Column4(end:end+size(CalcValue, 1)-numel(Column4))=nan; add as many nans as there are extra rows in CalcValue

[Matlab User]

it's not working.

[Guillaume]

If all the plotted points are separated by nans, you would get only red squares:

xy = reshape([1:10; nan(1, 10)], 1, [])  %values separated by nans
plot(xy, xy, '-rs')

I have no idea if that is your issue or not. Look at what's in CalcValue(:, 1) and Column4.