Why does the CAT function return error when attempting to concatenate a cell array with an empty vector in MATLAB 7.0 (R14)?

When, I try to concatenate a cell array with an empty array in MATLAB 7.0 (R14):

a = {'123', 'qwe', 'asd'}; 

x = []; 

cat(1, a, x)

I receive the following error:

 ??? Error using ==> cat 

 The following error occurred converting from double to cell: 

 Error using ==> cell 

 Size vector must be a row vector with integer elements.

Answer 1

[MathWorks Support Team]

This bug has been fixed in MATLAB 7.0.4 (R14SP2). If you are using a previous version, read the following:

There is a bug in MATLAB 7.0 (R14) that affects the way MATLAB handles empty arrays. To work around this issue, convert "x" to a cell array.

a = {'123', 'qwe', 'asd'}; 

x = []; 

cat(2, a, {x})