Overlay different plots

[Arnau Valladares-Esteban]

Dear all,

Is there a way to achieve what the following code produces:

use https://stats.idre.ucla.edu/stat/stata/notes/hsb2, clear

twoway (scatter read write if race == 1) ///
       (scatter read write if race == 2) ///
       (scatter read write if race == 3) ///
       (scatter read write if race == 4)

Without having to write all the possible values of race? Something like:

twoway (scatter read write), by(race)

But producing one graph instead of four?

Thank you!

[Nick Cox]

Consider sepscatter from SSC.

https://www.statalist.org/forums/for...lable-from-ssc

In this case, I don't find the result compelling. The result is what has been called the paella problem, the lesser known cousin of the spaghetti problem.

One alternative is fabplot from the Stata Journal -- see https://www.statalist.org/forums/for...ailable-on-ssc for the gist.

Another is use convex hulls too. Compare https://www.statalist.org/forums/for...-scatter-plots

use https://stats.idre.ucla.edu/stat/stata/notes/hsb2, clear
set scheme s1color 
sepscatter read write, sep(race) name(G1, replace)
fabplot scatter read write, by(race) name(G2, replace) frontopts(ms(O) mcol(blue%50) msize(large))