MATLAB: Recursion for Unnesting 1×1 Cell Array

recursion

I have been getting continuous errors for reaching the maximum recursion limit when running various test cases for my function. Since unnesting a 1×1 cell array to get a string can usually be done by:

ca = {{{'math'}}}

while iscell(ca)

ca = ca{1}

end

out = ca

For recursion, I did this:

function out = doYouEverFeel(ca)

if ischar(ca)

out = ca

else

out = doYouEverFeel(ca{1});

end

Why is this not working?

Best Answer

Are you sure it is a single quote char string 'example' and not a double quote string "another_example"? What is the actual error message displayed? Your recursion code will only work if the end result is always a char variable.

Related Solutions

MATLAB: How to unnest nested cell arrays?

It is a very good attempt. Here is an example that is almost what you did:

 >> A = {{5,6}; {7}; {8,9,3}}
 A =
  3×1 cell array
    {1×2 cell}
    {1×1 cell}
    {1×3 cell}
 >> maxLength = max(cellfun(@numel,A));
 >> result = cellfun( @(x) [cell2mat(x), zeros(1,maxLength-numel(x))], A, 'UniformOutput', false )
 result =
  3×1 cell array
    {1×3 double}
    {1×3 double}
    {1×3 double}
 >> result = vertcat( result{:} )
 result =
     5     6     0
     7     0     0
     8     9     3

You chose the other option to concatenate zeros to x which is a cell array, and you just forgot to convert the numeric array output'ed by ZEROS into a cell array with NUM2CELL.

The last operation develops result in a comma separated list of cells content (which are 1x3 numeric arrays given my approach), and concatenates it vertically.

MATLAB: How to Unnest Nested cell arrays

Given your array X:

X(:,17) = vertcat(X{:,17});

Note that this will only work if all of the cells in that column contain cell arrays. It will cause an error if any cell in the column contains any other data type.

Best Answer

Related Solutions

MATLAB: How to unnest nested cell arrays?

MATLAB: How to Unnest Nested cell arrays

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