Creating an m by n matrix of 0s and 1s from m-sized vector of column indexes

Question

I have a m-dimensional vector of integers ranging from 1 to n. These integers are column indexes for m × n matrix.

I want to create a

Answer 1

Or without sparse matrix:

>> M = zeros(max(v),length(v));
>> M(v'+[0:size(M,2)-1]*size(M,1)) = 1;
>> M = M'

M =

 0     0     0     1
 1     0     0     0
 0     1     0     0

Transposition is used because in matlab arrays are addressed by columns