How to apply a relational operator on a cell in MATLAB?

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Haitham AL Satai 2022-9-20

评论： Haitham AL Satai 2022-9-20

I would like to know the number of values that are less than 0.0038 in a cell of 41 X 41 double.

For example, I have the cell below:

B = num2cell(rand(41));

When I applied such condition

sum(A(:) < 0.0038)

, it gave me an error, which is Operator '<' is not supported for operands of type 'cell'.

So, do I need to convert the cell to a matrix and apply the operation? Or is there any specific way to use this condition on the cell directly?

Stephen23 2022-9-20

B = num2cell(rand(41));

Why use such an inefficient approach to storing numeric data?

Most likely your task would be much simpler if you used a numeric array.

Star Strider 2022-9-20

‘Or is there any specific way to use this condition on the cell directly?’

Star Strider 2022-9-20

Use the cellfun and nnz functions —

B = num2cell(rand(41));
A = nnz(cellfun(@(x)x<0.0038, B))
A = 5

Star Strider 2022-9-20

@Haitham AL Satai — My pleasure!

@Stephen23 — Thank you!

@Stephen23 Thank you for your notice. I got it now. Thank you again.

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