Multiply a column by a number

How Could I simply multiply each element of this array by 4? A=array(:,6);

Answer 1

[David Fletcher]

A=A.*4

Answer 2

[Roger Stafford]

Let Ar be the name of the array.

Ar(:,6) = 4*Ar(:,6);

What could be simpler? Since 4 is a scalar, it is automatically applied to each element of that column.