Mod or Modulus operator in MATLAB

I want to perform a mod operation on a number.

|10| = 10

|-10| = 10

Basically it returns the positive value of the input. All I could find is the sign() operator which returns 1,-1 or 0. Is there a operator to return the positive value of input?

[Antonio Cedillo Hernandez]

abs(10) = 10

abs(-10) = 10

Answer 1

[Matthew Sisson]

I think you are looking for the absolute value function:

https://www.mathworks.com/help/matlab/ref/abs.html

Answer 2

[John D'Errico]

Be careful, as if you look for mod or modulus, you will often see the functions mod or rem, which essentially compute a remainder after division. My guess is, you were searching for the wrong thing by looking for mod or modulus.

You are asking about the absolute value function. This is pretty standard in most computer languages I can think of as the function named abs. So

abs([-10 10])

ans = 1x2

10 10

Could you have computed that using the sign function? Well, yes. in terms of real numbers, we would have the identity in MATLAB

abs(x) == x .* sign(x)

Effectively, that just switches the sign of the number when it is negative.

But you should also recognize that when applied to complex numbers, abs does more than just multiply by -1 as needed.

Anyway, it is abs that you are asking about.