[R] stars (as fourfold plots) in plot (symbols don't work)

[maiya]

I was feeling pretty silly when I saw there was actually a locations
parameter in stars, as well as axes etc. 

But now the problem is that the x and y axes in stars must be on the same
scale! Which unfortunately makes my data occupy only a very narrow band of
the plot. I guess one option would be to scale one set of coordinates and
then manually change the axis labels!? But  I'll have a look at my.symbols
first.

Thanks for the tip!

Maja




Greg Snow-2 wrote:
> 
> Here are 2 useful paths (it's up to you to decide if either is the right
> path).
> 
> The my.symbols function in the TeachingDemos package allows you to create
> your own functions to create the symbols.
> 
> But in this case, you can just use the locations argument to the stars
> function:
> 
>> stars(cbind(1,sqrt(test[,3]), 1, sqrt(test[,3]))/16,
>> locations=test[,1:2],
> + col.segments=c("gray90", "gray"),draw.segments=TRUE, scale=FALSE)
> 
> -- 
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.snow at imail.org
> 801.408.8111
> 
> 
>> -----Original Message-----
>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
>> project.org] On Behalf Of maiya
>> Sent: Saturday, June 06, 2009 4:03 PM
>> To: r-help at r-project.org
>> Subject: [R] stars (as fourfold plots) in plot (symbols don't work)
>> 
>> 
>> Hi!
>> 
>> I have a dataset with three columns -the first two refer to x and y
>> coordinates, the last one are odds ratios.
>> I'd like to plot the data with x and y coordinates and the odds ratio
>> shown
>> as a fourfold plot, which I prefer to do using the stars function.
>> 
>> Unfortunately the stars option in symbols is not as cool as the stars
>> function on its own, and now i can't figure out how to do it!
>> 
>> here's an example code:
>> #data
>> test<-cbind(c(1,2,3,4), c(1,2,3,4), c(2,4,8,16))
>> #this is what I want the star symbol to look like
>> stars(cbind(1,sqrt(test[1,3]), 1, sqrt(test[1,3])),
>> col.segments=c("gray90", "gray"),draw.segments=TRUE, scale=FALSE)
>> #this is what happens when using stars in symbols
>> symbols(test[,1], test[,2], stars=cbind(1,sqrt(test[,3]), 1,
>> sqrt(test[,3])))
>> 
>> Can anyone set me on the right path please?
>> 
>> Maja
>> --
>> View this message in context: http://www.nabble.com/stars-%28as-
>> fourfold-plots%29-in-plot-%28symbols-don%27t-work%29-
>> tp23905987p23905987.html
>> Sent from the R help mailing list archive at Nabble.com.
>> 
>> ______________________________________________
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>> PLEASE do read the posting guide http://www.R-project.org/posting-
>> guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> ______________________________________________
> 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
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> 
> 

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