How to transform a vector to a matrix with same position ?

Hello everyone!

i want to ask you, if i have a matrix A in each row i have only one value , the rest are set to zero.Also i have a column vector V.

V =sum(A,2) but with removed elements.

I want to replace the value in A by the value in V at the same positions.

this is an example :

A=[100  0   0   0   0   0
    0   50  0   0   0   0
    0   0   0   20  0   0
    0   0   0   0   30  0
    0   0   0   0   0   80]

here the removed element in row 2 (50).

So V is the follow:

V=[100
    20 
    30  
    80]

Now i want to replace A by elements in V.

the required result is :

A1=[100  0   0   0   0   0
    0   0   0   20   0    0
    0   0   0    0    30   0
    0   0   0    0    0   80]

How can i do that?

Answer 1

[Matt J]

A=A(    ismember(sum(A,2),V)  ,:)

[Safia]

Thank you so much