replacing all numbers in a certain row

Hi Guys Is there a way to replace all values in a row if just one value in the row meet a condition. Given a random 5x5 matrix. my condition is, if one number in a row is equal to -3, then all values in that row must be changed to -3.

To start with I thought that i could make a for loop, and then check each row and see if it meet the condition

Thank you in advance!

-David

Answer 1

[Stephen23]

Where M is your matrix:

M(any(M==-3,2),:) = -3

For example:

>> M = randi(9,5);
>> M(4,2) = -3
M =
   5   2   5   1   7
   2   3   5   8   3
   6   3   4   9   5
   8  -3   9   7   2
   5   6   8   8   9
>> M(any(M==-3,2),:) = -3
M =
   5   2   5   1   7
   2   3   5   8   3
   6   3   4   9   5
  -3  -3  -3  -3  -3
   5   6   8   8   9

Answer 2

[David Hindahl]

Thanks man it works :-)