How to divide a matrix by certain numbers?

I want to divide a matrix by a column vector in this way:

(4 2 3 8;7 9 1 5;6 4 8 3) / (4;8;2)

and then the result i want to get is:

(4/4 2/4 3/4 8/4;7/8 9/8 1/8 5/8;6/2 4/2 8/2 3/2)

Answer 1

[Star Strider]

Try this:

A = [4 2 3 8;7 9 1 5;6 4 8 3];
B = [4;8;2];
format rat
Q = bsxfun(@rdivide, A, B)

Q =
       1              1/2            3/4            2       
       7/8            9/8            1/8            5/8     
       3              2              4              3/2

[Royvg94]

What means format rat? And what does it do?

[Star Strider]

The format rat sets the format in the Command Window to rational fraction approximation, since I thought that is what you wanted. (See the documentation on format for a full description of that and other options.) This just affects the Command Window output, and full double-precision representation is maintained internally.

Answer 2

[Thorsten]

 A./repmat(v, 1, size(A, 2))

[Royvg94]

Can you explain this a bit more?

[Thorsten]

You expand the column vector v to the size of the matrix by replicating it using repmat, then you use point-wise division ./