How to direct FOR loop to next iteration when one fails - and just skip failed iteration, when compiling date in structural vectors?

I have a series of functions that compile .txt file data. Below are two functions, FUNCTION 2 calls FUNCTION 1.

The problem is, sometimes I input a range of data files to compile... and if one file is missing, the for loop terminates and the data is not compiled.

I have tried using return, or continue within the for loop, if the data vector produced is empty (e.g., file doesn't exist), to no avail.

Any ideas?

The for loop terminates here in FUNCTION 1:

for field = 1:length(allfieldnames{1}) dat.(cell2mat(allfieldnames{1}(field,:))) = alldat{field}; end

.... and terminates here in FUNCTION 2:

 else
        allfieldnames = fieldnames(dat);
        for field = 1:length(allfieldnames)
          newalldat.(allfieldnames{field}) = [alldat.(allfieldnames{field});dat.(allfieldnames{field})];

%%%%%%%%% FUNCTION 1:

function dat = td_session(filename,rat,session);

%% opens data file and assigns 'fileID' %% filename - 'DIS_F20_S14.dat.txt' dat = []; fid = fopen(filename);

%% error message for most recent failed file if fid < 0, fprintf('***Warning: could not open %s...skipping\n' ,filename), return; end %% Reads data from opened files in 'fid' % places data into matrix [data] [dattxt] = fscanf(fid,'%c',inf); allfieldnames = textscan(dattxt,'%s',15); alldat = textscan(dattxt,'%d %s %d %s %d %d %d %f %f %f %f %s %s %s %s','HeaderLines',2);

for field = 1:length(allfieldnames{1}) dat.(cell2mat(allfieldnames{1}(field,:))) = alldat{field}; end len = length(alldat{field}); dat.RatID = rat.*ones(len,1); dat.SessID = session.*ones(len,1); fclose(fid);

FUNCTION 2:

verbose = 1; DATA = []; for r = 1:length(rat) for s = 1:length(sess) if(verbose), fprintf('Sess %d, Rat %d\n',sess(s),rat(r)); end filename = cell2mat(filenames_cells{r}(s,:)); fidtest = fopen(filename), if fidtest < 0;, return, end dat = td_session(filename,rat(r),sess(s)); if ~isempty(dat), DATA = appendData(DATA,dat);

            if (verbose), fprintf('Appended file %s\n',filename); end

        end
        if isempty(dat), continue, end
    end
end

function newalldat = appendData(alldat,dat)

    if isempty(alldat)
         newalldat = dat;        
    else
        allfieldnames = fieldnames(dat);
        for field = 1:length(allfieldnames)
          newalldat.(allfieldnames{field}) = [alldat.(allfieldnames{field});dat.(allfieldnames{field})];
        end
    end

[Jan]

Please use the code formatting to make your code readable. Look at the "Markup" link on this page.

Answer 1

[Fangjun Jiang]

Just answer the question in your title, use try() and catch() to capture the error, use continue to go to the next iteration.

for k=1:100
  try
   % do something
  catch
     continue;
  end
end

To find out more

help try
help continue

[Matt Fig]

BREAK doesn't go to the next iteration, but breaks the loop. I think you mean CONTINUE.

[Fangjun Jiang]

Thanks, Matt!