MATLAB: How to create a variable from cell array contents

cell arrayMATLAB

I have a cell Array vector as attached (length may vary). It contains variable names.

 mycell =
  5×1 cell array
    {'x'   }
    {'y'   }
    {'var1'}
    {'var2'}
    {'var3'}

How to create a new variable as follows?

 out = [x;y;var1;var2;var3];

Best Answer

You can use struct:

for idx_cell = 1:size(mycell,1) out.(mycell{idx_cell})={}; end

Related Solutions

MATLAB: Concatenate arrays within a loop,

Easy, given any number of arrays in a cell array C. You could use a loop like this, although it is inefficient because the output array is not preallocated:

C = {[1,2],[3,4],...} % cell array of arrays.
A = C{1};
for k = 2:numel(C)
    A = [A;C{k}];
end

Simpler and more efficient would be to concatenate them all at once, without a loop, e.g.:

A = vertcat(C{:})

Whatever you do, do NOT try to access variable names dynamically in a loop! Read this to know why:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Using an array (e.g. a cell array) and indexing is much simpler, neater, much more efficient, less buggy, and easier to debug.

MATLAB: How to remove empty cell array contents

To remove empty cell array contents (title of your question) :

 R(~cellfun('isempty',R))

Best Answer

Related Solutions

MATLAB: Concatenate arrays within a loop,

MATLAB: How to remove empty cell array contents

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