MATLAB: Sort two matrix

Question

hi i have two matrix X,Y (same size) i want to sort X and the same time i want to take the matrix Y with the same changes as X

example:

X=[4,7,1,9] Y=[32,6,4,21]

after sort

X=[9,7,4,1] Y=[21,6,32,4]

thanks for your time!!!!

Answer 1

[X,index]=sort(X,'descend')
Y=Y(index)