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 get the desired output with a single call to bsxfun -

n = 10
shift = 1
A = bsxfun(@eq,[1:n].',1-shift:n-shift)

Since you are basically creating a sparse matrix, alternatively you can use sparse -

n = 10
shift = 1
A = full(sparse(1:n-shift,1+shift:n,1,n,n))