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Recursion for Unnesting 1x1 Cell Array

Asked by Qasim Hassan on 11 Apr 2019
Latest activity Commented on by James Tursa
on 11 Apr 2019
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?

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1 Answer

Answer by James Tursa
on 11 Apr 2019
Edited by James Tursa
on 11 Apr 2019
 Accepted 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.

  2 Comments

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.
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

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