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Re: st: graph rarea optical illusion or coding error?


From   Scott Merryman <scott.merryman@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: graph rarea optical illusion or coding error?
Date   Wed, 11 May 2011 08:04:47 -0500

The scheme as a default intensity of 80% or if you open on the graph
in the Editor you can see that the fill intensity is 80%.

It appears adding -fin(100)- seems to help.

Regarding the -lcolor(none)- removing the area completely - if there
is no outline then there is no interior defined by the outline (see
http://www.stata.com/statalist/archive/2003-05/msg00685.html).

Scott

On Wed, May 11, 2011 at 7:02 AM, Ulrich Kohler <kohler@wzb.eu> wrote:
> 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
> -------------------------------------------------------------------
>

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