How can I scatterplot by group by the sign of the variable?

Hello!

I have data for two variables:

I wish to scatterplot the viarables such that when the variables have the same sign, lets say, both positive, the plot is filled. If they are not identical, they are not filled.

It will look something as this

Thanks :-)

Answer 1

[Adam Danz]

If you have the statistics and machine learning toolbox,

g = sign(var1)==sign(var2); 
gscatter(x,y,g)

If you do not have access to gscatter,

g = sign(var1)==sign(var2); 
scatter(x(g),y(g)); 
hold on
scatter(x(~g),y(~g)); 

In both cases, x, y, and g must have the same number of elements.

[EK]

Sounds like a simple solution! Is the gscatter open source?

[Adam Danz]

Well, none of Matlab's functions are open source. But if you have a matlab license gscatter is accessible to read.