Changing elements of row after certain element of m*n matrix

Hi,

I have a m*n matrix where some of rows are like these for exmaple

x=[-1,-0.65,-0.45,0,0.3,0.8,1,0.4,0.2,-0.1;
   -1,-0.65,-0.45,0,0.3,0.8,0.9,1,0.2,-0.1]

I know the idx=[7,8] after which the elements become 0.

Now I need to make new row as follows using idx

x1=[-1,-0.65,-0.45,0,0.3,0.8,1,0,0,0;
    -1,-0.65,-0.45,0,0.3,0.8,0.9,1,0,0]

Answer 1

[Jan]

x    = [-1, -0.65, -0.45, 0, 0.3, 0.8, 1,  0.4, 0.2, -0.1;
        -1, -0.65, -0.45, 0, 0.3, 0.8, 0.9, 1,  0.2, -0.1];
idx  = [7, 8];
m    = (1:size(x, 2)) > idx(:);
x(m) = 0

x = 2×10

-1 -0.65 -0.45 0 0.3 0.8 1 0 0 0 -1 -0.65 -0.45 0 0.3 0.8 0.9 1 0 0

[Rajesh]

Thanks!