tabular setdiff with for loop

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UQFG 2017-10-27

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https://ww2.mathworks.cn/matlabcentral/answers/363571-tabular-setdiff-with-for-loop

评论： Rik 2017-10-27

Is it possible to use a for loop to get multiple outputs of tabular setdiff? ie. This works:

A=table([1;2;3])
% B=1x5 cell with 5 tables to compare to A
D=setdiff(A,B{1,1})

but this doesn't:

for i=1:5
D{i}=setdiff(A,B{i})
end

and gives the error: "You cannot subscript a table using linear indexing (one subscript) or multidimensional indexing (three or more subscripts). Use a row subscript and a variable subscript."

Note:

for i=1:5
D=setdiff(A,B{i})
end

..works too, although it obviously overwrites D with each for loop. How do I make it save the 5 tables to a 1x5 cell like the usual for loop output?

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UQFG 2017-10-27

Ah... yes, from trying to fix my code. Deleted it and ran the code again, and it now works. Thank you!

Rik 2017-10-27

That is one of the reasons why it is useful to pre-allocate your arrays before the loop: it makes sure you have no old variables interfering with your loop. Better yet is to work with functions instead of scripts, but during the earliest stages that can be too much of a hassle.

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