# Reducing every value of a matrice every time by the same value

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gamer on 10 Jun 2021
Commented: gamer on 12 Jun 2021
Hello, I am new at matlab and I have a question. Is it possible to reduce every single value of a nx2 matrix by the same amount until all values are zero? Maybe in a for loop?
John D'Errico on 11 Jun 2021

Matt J on 10 Jun 2021
Edited: Matt J on 10 Jun 2021
This might be what you want, but as @Scott MacKenzie says you've left a lot of problem details and issues for us to guess,
while any(matrix(:)>0)
matrix=max(matrix-something,0);
end
gamer on 12 Jun 2021
So first thank you very much for your answers Matt and dpb. Its really that you want to help me!
I tried that one but I think I have to explain the problem more in detail. I created n spheres with that starting location.
p=[r + (a-2*r)*rand(n,1),r + (b-2*r)*rand(n,1)];
Then I wanted to move this spheres. So I created a matrix for speed.
v=rand(n,2);
Then I want to update the position with a for loop.
for f = 1:1000
p = p + v;
end
The movement is working. But I dont get how to slow the balls down. Is it possible to create f = 1000 of matrix out of the first one and the values are always reduced be a=0.001. And if one value is smaller than 0.001, this value should be 0 for the following matrixs
So the for loop would be: p = p + v(f)?