Check if random (x,y) coordinates exist in separate x vector and y vector

I have a vector of x coordinates (called circox) and a vector of corresponding y coordinates (called circoy). I then generate a random x and y coordinate and need to check if these coordinates already exist as a pair in circox and circoy. If they already exist I will reject them. In pseudo code I am trying to achieve this:

circox = (x1, x2, x3, ...40 values)
circoy = (y1, y2, y3, ...40 values)
x = rand
y = rand
if ((x,y) appears as a pair in (circox,circoy)),
  reject x and y;
else
  accept x and y;
end

Just need to figure out the if part. In theory I could loop through each position in circox and circoy, checking if it matches the randomly generated (x,y) coordinates but I'm hoping there's a neater function built into MATLAB.

Any ideas?

Answer 1

[Walter Roberson]

ismember() with the 'rows' option.

[David]

Perfect, just what I needed! Thanks.