[R] ggplot2 error: "Error in as.environment(where) : 'where' is missing"

[Bert Gunter]

I just wanted to point out that the construction:

dataf <- as.data.frame(cbind(Sample,Vals))

is **EVIL** .

Why?
cbind() constructs a matrix out of the separate vectors, and must
coerce columns of different types, as is the case here, to do so (a
matrix must be of one data type). Consequently

> sapply(dataf,class)
  Sample     Vals
"factor" "factor"

## is almost certainly not what is wanted.

The correct way to create the data frame is simply:

> df <- data.frame(Sample, Vals)
> sapply(df, class)
   Sample      Vals
 "factor" "integer"

I have no idea whether the evil construction this is related to your
difficulties, but it couldn't help.

Cheers,
Bert

On Tue, Jun 11, 2013 at 10:44 AM, Brian Smith <bsmith030465 at gmail.com> wrote:
> Hmm...I think it used to work before, but it gives an error now. Here is
> some sample code:
>
> =============
> library(ggplot2)
> Sample <- rep(c('A','B'),rep(10,2))
> Vals <- sample(1:1000,20)
> dataf <- as.data.frame(cbind(Sample,Vals))
> myplot <- ggplot(dataf,aes(x=Vals,colour=Sample)) + geom_density()
> myplot
> =============
>
> I get the following error:
>
> "Error in as.environment(where) : 'where' is missing"
>
> Am I doing something wrong?
>
> thanks!
>
>
>
> **************** sessionInfo() ***************
>
> R version 2.15.2 (2012-10-26)
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
>
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] splines   grid      stats     graphics  grDevices utils     datasets
> methods   base
>
> other attached packages:
>  [1] gridExtra_0.9.1       sm_2.2-4.1            imputation_2.0.1
> locfit_1.5-9          TimeProjection_0.2.0  Matrix_1.0-12
> timeDate_2160.97
>  [8] lubridate_1.2.0       gbm_2.0-8             survival_2.37-4
> gplots_2.11.0         MASS_7.3-23           KernSmooth_2.23-10
> caTools_1.14
> [15] gdata_2.12.0          heatmap.plus_1.3      ggdendro_0.1-12
> ggplot2_0.9.3.1       hgu133a.db_2.7.1      affy_1.34.0
> genefilter_1.38.0
> [22] biomaRt_2.12.0        org.Hs.eg.db_2.7.1    GOstats_2.22.0
> graph_1.34.0          Category_2.22.0       GO.db_2.7.1
> RSQLite_0.11.2
> [29] DBI_0.2-5             geneplotter_1.34.0    lattice_0.20-15
> annotate_1.34.1       AnnotationDbi_1.18.4  Biobase_2.16.0
> BiocGenerics_0.2.0
> [36] colorRamps_2.3        RColorBrewer_1.0-5    sparcl_1.0.3
> gap_1.1-9             plotrix_3.4-6         som_0.3-5
> pvclust_1.2-2
> [43] RobustRankAggreg_1.0  impute_1.30.0         reshape_0.8.4
> plyr_1.8              zoo_1.7-9             data.table_1.8.8
> foreach_1.4.0
> [50] foreign_0.8-53        languageR_1.4         preprocessCore_1.18.0
> gtools_2.7.1          BiocInstaller_1.4.9   hash_2.2.6
>
> loaded via a namespace (and not attached):
>  [1] affyio_1.24.0    bitops_1.0-4.2   codetools_0.2-8  colorspace_1.2-1
> dichromat_2.0-0  digest_0.6.3     GSEABase_1.18.0  gtable_0.1.2
> IRanges_1.14.4
> [10] iterators_1.0.6  labeling_0.1     munsell_0.4      proto_0.3-10
> RBGL_1.32.1      RCurl_1.95-4.1   reshape2_1.2.2   scales_0.2.3
> stats4_2.15.2
> [19] stringr_0.6.2    tools_2.15.2     tree_1.0-33      XML_3.96-1.1
> xtable_1.7-1     zlibbioc_1.2.0
>
>         [[alternative HTML version deleted]]
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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