How to calculate in a matrix

If I had a matrix A=[12 3 65,2 3 6,68 15 40]

I want to change second array of matrix A multiply 10

will be like A=[12 3 65,20 30 60,68 15 40]

How can I do ?

Thank you

Answer 1

[KSSV]

A=[12 3 65 ;2 3 6 ;68 15 40] ;
iwant = A ;
iwant(:,2) = 10*iwant(:,2) ;

Read about matrix indexing......

[min wong]

thank you

[Laith Mohammed]

Good answer just reverse iwant(2,:) = 10*iwant(2,:)