concat 2 dimensional cell array with strings to one large string in matlab

Question

I have the folliwing cell are of strings:

myCellArray = {'M1','M36','M129'}

I would like to display the contents of myCellArray in an error message to the user of my function. If I simply do:

error(['Please correct elements with IDs:' cell2mat(myCellArray)])

The error looks like: Please correct elements with IDs:M1M36M129

How can I adjust the code that the elements are separated by a comma, so the error shown would be: Please correct elements with IDs:M1, M36, M129.

I tried something like:

a=num2cell({ ...
  myCellArray; ...
  repmat( ...
    {', '}, ...
    1, ...
    length(myCellArray) ...
  ) ...
});
b=strcat(a(:));

But this did not work.

Shai · Accepted Answer · 2013-06-20 11:39:04Z

1

try using sprintf

>> error(['please correct elements with IDs: ', sprintf('%s, ', myCellArray{:}) ] )

results with

??? please correct elements with IDs: M1, M36, M129,

answered Jun 20, 2013 at 11:39

Shai

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3 Comments

Oleg Over a year ago

error('...%s%s',sprintf('%s, ',myCellArray{1:end-1}), sprintf('%s.', myCellArray{end})) to avoid last comma.

Shai Over a year ago

@OlegKomarov the last comman is annoying, but is it worth all the trouble for removing it?

Oleg Over a year ago

Depends, and that's why I commented instead of answering :).

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