interpolation of 3d matrix in only one dimention

i have 4X49X49 matrix B, i want to use interpolate the first dimantion with spline interpolation to get 49X49X49 matrix.

from doing that:

A=interp(B,4,'spline')
X=A(:,1:16:end,:);
X2=X(:,:,1:16:end);
    

i got the matrix i want but the next thing that i want to do is to interpolate using 'linear' in Y direction so i want to learn how i can do different interpolations to different dimantions.

thanks

Answer 1

[Matt J]

permute the array using permute() or shiftdim() so that the desired dimension becomes the first dimension.

C=interp(shiftdim(A,1),4,'linear');
C=shiftdim(C,-1);