Graph - Spearman Correlation

[Stephanie Raymundo]

Hello everyone.

I am currently looking at the correlation between two variables using the spearman correlation since I needed a non-parametric test.
The calculations are going well, but I was unable to find out how to generate a spearman correlation graph. Can anyone help?

Many thanks!

. spearman A B, star(0.05)

Number of obs = 74
Spearman's rho = -0.6363

Test of H0: A and B are independent
Prob > |t| = 0.0000

[Nick Cox]

The linked graph would plot ranks, not values. But it would be a good idea to look at both. Here's a mundane but still instructive example in which some curvature is suitably ignored by the ranks.

sysuse auto, clear

set scheme s1color 
egen rank1 = rank(mpg)
egen rank2 = rank(weight)
corr rank?
local show : di %4.3f r(rho)

scatter rank1 rank2, ms(Oh) subtitle(Spearman rank correlation `show') name(G1, replace) ytitle(Rank on mpg) xtitle(Rank on weight) aspect(1)

corr mpg weight
local show : di %4.3f r(rho)
scatter mpg weight, ms(Oh) subtitle(Pearson correlation `show') name(G2, replace) aspect(1)

graph combine G1 G2