Remove Certain Values in Matrix

Hi All,

I have a 8x6 matrix called Vel. Each Column contains one zero value, which is kind of a cutt off. What I want to do is set all the values in the column below the zero value to zero. So I should end up with a matrix that looks like this.

1 3 6 22 25 33

11 12 15 12 15 67

1 32 21 4 25 3

11 12 5 33 15 7

11 32 6 2 25 33

1 0 0 0 12 22

0 0 0 0 0 0

0 0 0 0 0 0

I tried a few things using the index values for the zeroes but I wasn't able to solve the problem and ended up kind of going round in circles. Is there an easy way to achieve this???

Code is below:

Vel = [1,3,6,22,25,33; 11,12,15,12,15,67; 1,32,21,4,25,3; 11,12,5,33,15,7; 11,32,6,2,25,33; 1,0,0,0,12,22; 0,31,6,4,0,0; 12,6,5,5,8,7 ]

Vel = 8×6

1 3 6 22 25 33 11 12 15 12 15 67 1 32 21 4 25 3 11 12 5 33 15 7 11 32 6 2 25 33 1 0 0 0 12 22 0 31 6 4 0 0 12 6 5 5 8 7

index = find(Vel==0)

index = 6×1

7 14 22 30 39 47

Answer 1

[Chunru]

Vel = [1,3,6,22,25,33; 
    11,12,15,12,15,67; 
    1,32,21,4,25,3; 
    11,12,5,33,15,7; 
    11,32,6,2,25,33; 
    1,0,0,0,12,22; 
    0,31,6,4,0,0; 
    12,6,5,5,8,7 ];
for i=1:width(Vel)
    idx = find(Vel(:,i)==0, 1, 'first');
    Vel(idx:end, i)=0;
end
Vel

Vel = 8×6

1 3 6 22 25 33 11 12 15 12 15 67 1 32 21 4 25 3 11 12 5 33 15 7 11 32 6 2 25 33 1 0 0 0 12 22 0 0 0 0 0 0 0 0 0 0 0 0