Check if cell contains only certain combination of variables

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I have a 4x1 cell filled with 4 possible string values: 'A', 'B', 'C', or 'D'
I would like to ensure that the values in there either:
any combination of: 'A' and/or 'B'
any combination of 'C' and/or 'C'
But I want to raise an error if there is any mix between say A and C, or A and D, and so forth
Metin Akyol
Metin Akyol on 31 Jan 2022
So the above example, would thus be an invalid one based on my criterion, so this should raise a flag.

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Accepted Answer

Turlough Hughes
Turlough Hughes on 31 Jan 2022
Edited: Turlough Hughes on 31 Jan 2022
You can do this with an "exclusive or" (see xor) where you check that you have exlusively either 'A' or 'B' xor 'C' or 'D', but not a mix of A and C or A and D, etc. See the following:
x = {'A','B','C','D'}.';
% conditions
condA = any(matches(x,"A"|"B"));
condB = any(matches(x,"C"|"D"));
assert(xor(condA,condB),'Error: ...')

More Answers (1)

Benjamin Thompson
Benjamin Thompson on 31 Jan 2022
So something like this? I am sure you can add more detail to deal with all possible cases.
myCellArray{1} = 'A';
myCellArray{2} = 'B';
myCellArray{3} = 'C';
myCellArray{4} = 'D';
if (myCellArray{1} == 'A')
for (i = 2:4)
if ((myCellArray{i} == 'C') || (myCellArray{i} == 'D'))
disp('Not Good')


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