matlab - How can I divide each row of a matrix by a fixed row?

Question

Suppose I have a matrix like:

100 200 300 400 500 600
  1   2   3   4   5   6
 10  20  30  40  50  60
...

I wish to divide each row by the second row (each element by the corresponding element), so I'll get:

100 100 100 100 100 100
  1   1   1   1   1   1
 10  10  10  10  10  10
...

Hw can I do it (without writing an explicit loop)?

Answer 1

Use bsxfun:

outMat = bsxfun (@rdivide, inMat, inMat(2,:));

The 1st argument to bsxfun is a handle to the function you want to apply, in this case right-division.