accessing cell data using brace indexing,

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Tijjani Aminu Kuda
Tijjani Aminu Kuda on 27 Jan 2020
Commented: Walter Roberson on 29 Aug 2021
Hi everyone,
I am tring to access the content of multiple cell in a loop. I have used the code:
for k = 1:length(predictors)
usg = predictors{k};
end
But it doesn't work. Instead I'm getting error that reads: Brace indexing not supported for this variable type. Could someone help please?

Answers (3)

Catalytic
Catalytic on 28 Jan 2020
You need to check what predictors really is. It is not a cell array, as you believe.

Image Analyst
Image Analyst on 28 Jan 2020
The error is saying it's not a cell array like you think. It's something else, like a double or something. Where did it come from? Did some other function create it? If so, what?
See the FAQ for a good discussion of cell arrays. This should give you a good idea of where and when to use braces, parentheses, and brackets. Granted, it can be confusing. But I think reading the FAQ will help.

Abdul Rof V
Abdul Rof V on 29 Aug 2021
Edited: Walter Roberson on 29 Aug 2021
PI=ones(10,10);
p0=0;
for i=1:5
p{i}=PI{i}
end
anything wrong in indexing
  1 Comment
Walter Roberson
Walter Roberson on 29 Aug 2021
You cannot use {} indexing with numeric arrays such as PI is assigned. {} indexing is reserved for container datatypes such as cell arrays or tables or strings.
You need () indexing for numeric datatypes.
Note: your PI is 2 dimensional, but you are using a single index for it. That does have meaning and can be valid, but please make sure it is what you want to do.

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