R help - Jun 2010 - specifying plot symbol sizes in qplot or ggplot2

Hi.

first things first ... thanks for ggplot2.

Now my question. I'm using qplot to generate a plot as follows where X,Y,Z,
A are columns in a dataframe.

qplot(X, Y, data=XYDATA, color=Z, geom=c("point"), size=A)

This works as expected. Factor A has three levels so there are three sizes
of the point plot symbol. I understand that the factor levels are mapped to
symbol sizes. However the sizes are too small for my liking. Is there any
way I can specify the range of plot symbol sizes that factor A levels are
mapped to?

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Have a look at ?scale_size_manual()

HTH,

Thierry

------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie & Kwaliteitszorg
Gaverstraat 4
9500 Geraardsbergen
Belgium

Research Institute for Nature and Forest
team Biometrics & Quality Assurance
Gaverstraat 4
9500 Geraardsbergen
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tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be
www.inbo.be

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> -----Oorspronkelijk bericht-----
> Van: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] Namens cfriedl
> Verzonden: woensdag 9 juni 2010 3:22
> Aan: r-help at r-project.org
> Onderwerp: [R] specifying plot symbol sizes in qplot or ggplot2
> 
> 
> Hi.
> 
> first things first ... thanks for ggplot2.
> 
> Now my question. I'm using qplot to generate a plot as 
> follows where X,Y,Z, A are columns in a dataframe.
> 
> qplot(X, Y, data=XYDATA, color=Z, geom=c("point"), size=A)
> 
> This works as expected. Factor A has three levels so there 
> are three sizes of the point plot symbol. I understand that 
> the factor levels are mapped to symbol sizes. However the 
> sizes are too small for my liking. Is there any way I can 
> specify the range of plot symbol sizes that factor A levels 
> are mapped to?
> 
> --
> View this message in context: 
> http://r.789695.n4.nabble.com/specifying-plot-symbol-sizes-in-
> qplot-or-ggplot2-tp2248217p2248217.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
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