[R] ggplot2, building a simple formula interface

[baptiste auguie]

Hi,

Try print(p) instead of plot(p)

HTH,

baptiste

2009/12/29 Bryan Hanson <hanson at depauw.edu>:
> I¹m trying to build a simple formula interface to work with a function using
> ggplot2. The following scheme ³works² up until the plot(p) request, at which
> point there are complaints about xlim¹s and a blank graphics window.
> Looking at str(p) I do see the limits are NULL, plus layer 1 claims to have
> an empty data frame (but df is reproduced correctly).  I'm sure I'm missing
> something really obvious; alas my ggplot2 book is at work and it's cold
> outside!
>
>
> simple <- function(formula, data, ...){
> mf <- model.frame(formula = formula, data = data)    }
>
> res <- rnorm(100)
> f1 <- rep(c("C", "D", "D", "C"), 25)
> f2 <- rep(c("A", "B"), 50)
> mydata <- data.frame(res, f1, f2)
>
> df <- simple(~ res + f1, mydata)
> p <- ggplot(df, aes(f1, res)) + geom_boxplot()
> plot(p)
>
> Thanks, Bryan
> *************
> Bryan Hanson
> Acting Chair
> Professor of Chemistry & Biochemistry
> DePauw University, Greencastle IN USA
>
>> sessionInfo()
> R version 2.10.1 (2009-12-14)
> x86_64-apple-darwin9.8.0
>
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] datasets  tools     grid      graphics  grDevices utils     stats
> methods   base
>
> other attached packages:
>  [1] ggplot2_0.8.5      digest_0.4.2       reshape_0.8.3      proto_0.3-8
> mvbutils_2.5.0     ChemoSpec_1.43
>  [7] R.utils_1.2.4      R.oo_1.6.5         R.methodsS3_1.0.3  rgl_0.87
> lattice_0.17-26    mvoutlier_1.4
> [13] plyr_0.1.9         RColorBrewer_1.0-2 chemometrics_0.5   som_0.3-4
> robustbase_0.5-0-1 rpart_3.1-45
> [19] pls_2.1-0          pcaPP_1.7          mvtnorm_0.9-8      nnet_7.3-1
> mclust_3.4         MASS_7.3-4
> [25] lars_0.9-7         e1071_1.5-22       class_7.3-1
>
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