Squeezing NaN's out of a square matrix to make a smaller square matrix

I have a matrix that looks like this:

M =[NaN    1     1     1     1
     2   NaN     2     2     2
     3     3   NaN     3     3
     4     4     4   NaN     4
     5     5     5     5   NaN];

and I want to remove the NaN's and retain the matrix shape so that it looks like this:

M =[2   1   1   1   1  
    3   3   2   2   2   
    4   4   4   3   3
    5   5   5   5   4];

I can't figure out how to code that though. Any suggestions?

Answer 1

[Wan Ji]

[p,q] = size(M);
M(isnan(M))=[];
M = reshape(M,p-1,q)

Then

M =

     2     1     1     1     1
     3     3     2     2     2
     4     4     4     3     3
     5     5     5     5     4

[Wan Ji]

Or just one line

M = reshape(M(~isnan(M)),size(M,1)-1, size(M,2))

[Shannon]

That does it - thanks!

[Wan Ji]

Can you give an accept if it helped you