Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
From | Ulrich Kohler <kohler@wzb.eu> |
To | statalist <statalist@hsphsun2.harvard.edu> |
Subject | st: graph rarea optical illusion or coding error? |
Date | Wed, 11 May 2011 14:02:43 +0200 |
Listers, I try to create a figure of shaded areas for 5%, 10%, 15% ... 95% confidence intervals. The resulting areas seem to have a lines around the areas that are darker than both neighbouring areas. Is it possible to get rid of this, or is this just an optical illusion? Here is a minimal example of my code. Note that I tried various settings for -lwidht()- , -lcolor()-, -fintensity()-. Most surprisingly -lcolor(none)- removes areas completely, btw. -----------------------------------------------------illusion.do sysuse auto, clear collapse (mean) mean=mpg (semean) se=mpg, by(rep78) local pen 15 forv alpha = .05(.06).95 { gen ub`pen' = mean + invnormal(1-`alpha'/2)*se di "gen ub`pen' = mean + `=invnormal(1-`alpha'/2)'*se" gen lb`pen' = mean - invnormal(1-`alpha'/2)*se local pen = `pen'-1 } forv i = 15(-1)1 { local rarea `rarea' /// || rarea ub`i' lb`i' rep78, /// lcolor(gs`i') fcolor(gs`i') lwidth(none) sort } graph twoway `rarea' || , legend(off) exit ------------------------------------------------------------------- * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/