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Group the values of a graph in four

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Dionisio Mendoza
Dionisio Mendoza on 10 Feb 2019
Closed: MATLAB Answer Bot on 20 Aug 2021
I need to group in 4 the values of these two vectors of 1500 numbers ranging from -100 to 100, so that the following graph divided into 4 sections appears. I do not know whether to use axes or what procedure to execute
x=-100+(100+100)*rand(1500,1);
y=-100+(100+100)*rand(1500,1);
plot(x,y,'or')
  3 Comments
Rena Berman
Rena Berman on 5 Mar 2019
(Answers Dev) Restored edit

Answers (1)

Walter Roberson
Walter Roberson on 11 Feb 2019
group = (x <= 0) * 2 + (y <= 0) + 1;
pointsize = 15;
scatter(x, y, pointsize, group);
colormap(jet(4))
  4 Comments
Walter Roberson
Walter Roberson on 11 Feb 2019
You can create a 4 x 3 matrix of color values and colormap() that matrix.

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