Re: st: Transparent graph

[Jeph Herrin <junk@spandrel.net>]

Interesting, I just asked a similar question yesterday
about overlapping histograms - I want to see one through
the other. No solution yet, but would like to know if you
find one.

Jeph

Sergiy Radyakin wrote:
> Dear All,
>
> I am writing a graphing procedure (directly with Stata's undocumented
> gdi commands). There is a pseudo-transparency effect as can be seen
> below:
>
> sysuse auto, clear
> generate ww = weight * 2.85
> twoway area price ww l, sort fi(100 100)
> twoway area price ww l, sort fi(30 30)
>
> Is it possible to achieve "true-transparency" (where the first "blue"
> graph could be seen through the second "pink")?
>
> In technical terms: does gdi shadelevel set color or the method of
> drawing (SET,OR,AND,XOR)? I.e. is it equivalent to
> gdi shadergb = `i' * `R'    `i' * `G'    `i' * `B'
> ??
>
> Thank you,
>    Sergiy Radyakin
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