Matlab identity shift matrix

Question

Is there any inline command to generate shifted identity matrix in MATLAB?

A=[ ...
0, 1, 0, 0, 0, 0, 0, 0, 0, 0
0, 0, 1, 0, 0, 0, 0, 0, 0, 0
0, 0, 0, 1, 0, 0         


        

Answer 1

You can use circshift and fix the matrix before passing it to the function:

>> shift = 1;
>> N=10;
>> A=circshift(diag(1:N>shift),-shift)
A =
     0     1     0     0     0     0     0     0     0     0
     0     0     1     0     0     0     0     0     0     0
     0     0     0     1     0     0     0     0     0     0
     0     0     0     0     1     0     0     0     0     0
     0     0     0     0     0     1     0     0     0     0
     0     0     0     0     0     0     1     0     0     0
     0     0     0     0     0     0     0     1     0     0
     0     0     0     0     0     0     0     0     1     0
     0     0     0     0     0     0     0     0     0     1
     0     0     0     0     0     0     0     0     0     0

1:N>shift will be 0 for fist shift number of places and 1 for the remaining.