matrix elements scaling

can anybody please tell me how to do scaling elements in matlab ? for example, I have a matrix like a = [1 2 4 5 6 4 9] I want to scale down the 3rd element by 2 that means 4/2 = 2 and last element 9 by 3 so that the new matrix will look like

a = [1 2 2 5 6 4 3]

thanks in advance dude

Answer 1

[Walter Roberson]

a(3) = a(3)/2;
a(7) = a(7)/3;

Or,

a = a ./ [1 1 2 1 1 1 3];