How can I reflect a signal on Y-Axis?

I would like to know how to reflect any signal only on the Y-Axis

[Mohammad Sami]

You can multiply your coordinate with a reflection matrix.

https://www.varsitytutors.com/hotmath/hotmath_help/topics/transformation-of-graphs-using-matrices-reflection

[Ahmed Mahmoud]

What if my input that I want to reflect is not 2x2 matrix?

[Adam Danz]

@Ahmed Mahmoud , the example in the link that Mohammad shared shows data that are not in a 2x2 matrix. Take some time to study the example. You'll see a 2x5 matrix containg 5 [X;Y] coordinates.

@Mohammad Sami, consider copying your comment to the answers section so you get credit for a good answer.

Answer 1

[Mohammad Sami]

You can multiply the reflection matrix with 2xn matrix of x,y coordinates.

x = [0 1 2 3 4 5];
y = [0 1 2 3 4 5];
reflectionmatrix = [-1 0; 0 1];
rm = reflectionmatrix * [x;y];
rx = rm(1,:);
ry = rm(2,:);