Got kind of behind in my Statalist readings. Thanks, Uli, for your contribution, too. I will give your overstriking symbol code a more serious look in the next few days.
Bis sp�ter,
Eric
> > > Eric G. Wruck
>> >> Is it possible to install a new symbolstyle (symbolstyles are the
>> >> circles, triangles, squares & so forth that can be used to mark
>> >> observations in a graph)? If so, how does one go about doing so?
>
>Michael Blasnik wrote:
>> I'd like to expand a little on Nick's 1st suggestion. You can actually get
>> at quite a variety of symbols by defining a variable that contains the
>> symbol you want and using marker labels. It takes some experimentation,
>> but if you can find a font that has the symbol you want, you can usually
>> get it into a Stata graph as the marker. For example, I found that
>> char(186) is the paragraph symbol in my default font, so:
>>
>> gen str1 c186=char(186)
>> gr tw scatter mpg weight, mlab(c186) mlabpos(0) msym(i)
>>
>> The resulting graph uses the paragraph symbol instead of a regular marker.
>> If you want to access some more esoteric symbol that isn't in the default
>> font's character set, you can change the font used in the graph window by
>> using Graph-Preferences.
>
>Nick Cox wrote:
>> You can
>>
>> 1 use printable characters within marker label variables
>>
>> 2 -separate- into classes and use e.g. different colours
>> or grayscales
>>
>>and
>>
>> 3 experiment with overstriking existing symbols.
>>
>> (snip) I think those are the only alternatives.
>>
>> The experiments I have seen on 3 were not encouraging,
>> but this revolves partly on matters of taste.
>
>Just for completeness here are the experiments with overstriking existing
>symbols. Besides the taste-issue, one problem is to get a legend for the
>"new" symbols (and this also applies for Michaels suggestion). The
>code-snipped below uses "legend-graph" as a workaround. This however is "at
>best, a kludge", as Nick pointed out in a private email exchange.
>
>----------------------------------------------------------------
>sysuse auto, clear
>separate mpg, by(rep78)
>
>// The Data-Graph
>sc mpg1 mpg2 mpg3 mpg3 mpg4 mpg4 mpg5 mpg5 weight, ///
> ms(Oh O Oh o Oh + O +) ///
> mcolor(black black black black black black black white) ///
> msize(*1.5 *1.5 *1.5 *.5 *1.5 *1.5 *1.5 *1.5) ///
> legend(off) name(g1, replace)
>
>// The Legend-Graph
>tw scatteri 2 1 (3) "Very Low", ms(Oh) mcolor(black) msize(*1.5) ///
>|| scatteri 2 2 (3) "Low", ms(O) mcolor(black) msize(*1.5) ///
>|| scatteri 2 3 (3) "Intermediate", ms(Oh) mcolor(black) msize(*1.5) ///
>|| scatteri 2 3, ms(o) mcolor(black) msize(.3) msize(*.5) ///
>|| scatteri 1 1 (3) "High" , ms(Oh) mcolor(black) msize(*1.5) ///
>|| scatteri 1 1, ms(+) mcolor(black) msize(*1.5) ///
>|| scatteri 1 2 (3) "Very High", ms(O) mcolor(black) msize(*1.5) ///
>|| scatteri 1 2, ms(+) mcolor(white) msize(*1.5) ///
>|| , legend(off) xscale(off range(0.5 4.5)) ylabel(, nogrid) ///
> yscale(off) fysize(10) fxsize(80) name(g2, replace)
>
>graph combine data legend, rows(2) iscale(*1.3)
>----------------------------------------------------------------------------
>
>many regards
>uli
>
>--
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--
===================================================
Eric G. Wruck
Econalytics
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Columbus, OH 43209
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