Save part of a big matrix to *.mat of another name

Hi,

Now I have a 3D matrix: abc = rand(2,3,3); I want to save only the second layer of the matrix abc(2,:,:) to the workspace, with the name of, e.g. new.mat

Matlab accepts the following code: save('new.mat', 'abc')

But not save('new.mat', 'abc(2,:,:)')

What should I do? any suggestion is appreciated!

Answer 1

[Azzi Abdelmalek]

 abc = rand(2,3,3);
 abc2=abc(2,:,:)
 save('new.mat', 'abc2')

[Pengfei]

Hi, thanks. But for my case, the abc matrix is huge, and I have to be very frugal about the memory. Making a copy like abc2=abc(2,:,:) will take more space and lower the speed for the code.

[Azzi Abdelmalek]

I suggest

 abc = rand(2,3,3);
 abc2=abc(2,:,:)
 abc(2,:,:)=[]
 save('new.mat', 'abc2')

or if you don't need abc

 clear abc % just before saving abc2