Combining x and y arrays and converting subsequent values

Question

Shah 2020-6-30

回答： Tommy 2020-6-30

I would like to combine 2 arrays (x and y coordinates on a 1920x1080 screen) and further simplify it to represent the quadrants they appear in.

when x<960 and y<540, I would just like the value in the table to say 1.

x>960 and y<540 would be quadrant 2

x>960 and y>540 would be 3

x<960 and y>540 would be 4.

Any help would be much appreciated!

KSSV 2020-6-30

x(x<960) = 1 ;

Rest you can do like above.

Shah 2020-6-30

how can i do it to be 1 only when both conditions of x and y are fulfilled, i.e x<960 and y<540?

Answer 1

Tommy 2020-6-30

Assuming x and y are formatted like the following...

[x,y] = meshgrid(1:1920,1:1080);

...then how about this?

q = nan(size(x));
q(x<960 & y<540) = 1;
q(x>960 & y<540) = 2;
q(x>960 & y>540) = 3;
q(x<960 & y>540) = 4;

What about row 540 and column 960?