how to extract data after squeeze the matrix?

i have 3D data that will be squeezed to 2D data matrix. the data is 116x150x45 where after the squeeze, i want to take out sample 1-25 only,

thus, Y should have 25 for Y(1) until Y(25), but i only got Y that will extract and replace after squeezing. anyone can help?

for a = 1:25
    Y=squeeze(fmridata(:,:,a)); % for healthy patients from 1-25
end

[Adam]

You would be far better off just taking

fmridata( :, :, 1:25 )

and working with it from there via indexing.

[Muaaz Badrul]

but the data will still be in 3D right? or it will be converted into 2D matrix?

[Adam]

It will still be stored in 3d yes. But how it is stored in a variable doesn't really matter. It's what you do with it from there that matters.

Answer 1

[Rik]

Something like this is probably what you're looking for, although it makes it more difficult to compare the same pixel over all patients.

Y=cell(1,25);
for a = 1:25
    Y{a}=squeeze(fmridata(:,:,a)); % for healthy patients from 1-25
end

[Stephen23]

Note that for a scalar a used as an index fmridata(:,:,a) returns an array with size 116x150 and thus squeeze is superfluous.

[Muaaz Badrul]

does this mean that the array of 116x150 have 25 layers? i need it slice by slice like Y1 , Y2, until Y25

[Rik]

My code will result in a cell array with 25 elements, where each cell contains a matrix of 116x150. This avoids numbered variables, which are a bad idea in general.

As indicated by others: The squeeze is not needed, and a 3D array is probably a better idea, depending on what you want to do next with this array.

[Muaaz Badrul]

okay thanks for your help.