Recursion for Unnesting 1x1 Cell Array

I have been getting continuous errors for reaching the maximum recursion limit when running various test cases for my function. Since unnesting a 1x1 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

end

Why is this not working?

Answer 1

[James Tursa]

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.

[Qasim Hassan]

Yes, it is always single quote char strings.

ERROR: Maximum recursion limit of 500 reached.

EDIT: I realized something was amiss in my test case file. Code runs as expected.

[James Tursa]

Is your nested cell really more than 500 levels deep? I would rewrite your recursion function to instead simply use your while loop.

function out = doYouEverFeel(ca)
while iscell(ca)
    ca = ca{1}
end
out = ca
end