st: colouring options of serrbar

["Truus F. Hausman" <truus.hausman@googlemail.com>]

Hello.

I am struggling with the colouring options of serrbar. I would like to
colour groups of markers and change the style of error bars.
Specifically, I have got three different estimates from 20 countries
(e.g. from three different years or three different estimators). The
countries form the x-axis, at each unit of the x-axis there are three
estimates. Now, I would like to colour those estimates that stem from
the same group (i.e. the same estimator or year). So far I am unable
to find a solution. I tried two different approaches:

a) conditions in mvopts
serrbar mvar svar xvar, mvopts(mcolor(black if group==1, blue if group==2

b) addplot()
serrbar mvar svar xvar if group==1, mvopts(mcolor(black))
addplot(serrbar mvar svar xvar if group==2, mvopts(mcolor(blue)))

Both do not work. The first does not change the colour of the markers,
the second is not allowed ("serrbar is not a twoway plot type"
r(198)).

Has anyone an idea how I can change the colour of the markers and
maybe also the style of the error bars? Or will I have to use a
different type of graph?

I hope I explained it clearly enough. Thanks for your help!

Best regards,
Truus
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