how to let elements in each column of a matrix divided by the first element in each column

is there a simple way to let all the elements in a column of a matrix divided by the first element of each column, without using for loop?

Answer 1

[dpb]

x=x./x(1,:);

uses recent automagic(*) singleton expansion, if you have earlier release that errors on size mismatch then use bsxfun

x=bsxfun(@rdivide,x,x(1,:));

(*) I don't recall just when was introduced around R2015 or so...R2014b is earliest presently installed here --

>> x./x(1,:)
Error using  ./ 
Matrix dimensions must agree. 
>>