Group the values of a graph in four

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Dionisio Mendoza 2019-2-10

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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')

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Dionisio Mendoza 2019-2-10

5c5d0af78d115-cuadrantes_graficas1.png

I want to divide that graph like this

Rena Berman 2019-3-5

(Answers Dev) Restored edit

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Walter Roberson 2019-2-11

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group = (x <= 0) * 2 + (y <= 0) + 1;
pointsize = 15;
scatter(x, y, pointsize, group);
colormap(jet(4))

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Dionisio Mendoza 2019-2-11

i mean colors of each section

Walter Roberson 2019-2-11

You can create a 4 x 3 matrix of color values and colormap() that matrix.

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