[BioC] Dates in DataFrames printed incorrectly?

[Ryan C. Thompson]

Hi all,

It looks like Date vectors, when used as columns in a DataFrame, are not 
printed correctly. The following example code demonstrates the problem:

library(IRanges)
x <- structure(c(16203, 16204, 16192, 16218, 16219, 16220, 16196,
16197, 16199, 16231, 16232, 16233, 16224, 16225, 16226, 16227
), class = "Date")
df <- data.frame(date=x)
DF <- DataFrame(df)
base::print.data.frame(df)
print(DF)

-Ryan

 > sessionInfo()
R version 3.1.0 (2014-04-10)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
  [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] splines   grDevices datasets  parallel  graphics  utils stats
[8] methods   base

other attached packages:
  [1] amap_0.8-12                GMD_0.3.1.1
  [3] gplots_2.14.0              statmod_1.4.20
  [5] DESeq2_1.4.5               RcppArmadillo_0.4.300.8.0
  [7] Rcpp_0.11.2                cqn_1.10.0
  [9] quantreg_5.05              SparseM_1.03
[11] preprocessCore_1.26.1      nor1mix_1.2-0
[13] mclust_4.3                 baySeq_1.18.0
[15] DESeq_1.16.0               lattice_0.20-29
[17] locfit_1.5-9.1             edgeR_3.6.2
[19] limma_3.20.6               arrayQualityMetrics_3.20.0
[21] partitions_1.9-15          biomaRt_2.20.0
[23] functional_0.4             sqldf_0.4-7.1
[25] RSQLite.extfuns_0.0.1      RSQLite_0.11.4
[27] DBI_0.2-7                  gsubfn_0.6-5
[29] proto_0.3-10               GenomicFeatures_1.16.2
[31] AnnotationDbi_1.26.0       chipseq_1.14.0
[33] inline_0.3.13              affy_1.42.3
[35] rtracklayer_1.24.2         Biobase_2.24.0
[37] ShortRead_1.22.0           GenomicAlignments_1.0.1
[39] BSgenome_1.32.0            BiocParallel_0.6.1
[41] Rsamtools_1.16.1           Biostrings_2.32.0
[43] XVector_0.4.0              doParallel_1.0.8
[45] iterators_1.0.7            Matrix_1.1-4
[47] GenomicRanges_1.16.3       GenomeInfoDb_1.0.2
[49] RColorBrewer_1.0-5         ESSR_1.0
[51] foreach_1.4.2              plyr_1.8.1
[53] stringr_0.6.2              IRanges_1.22.9
[55] BiocGenerics_0.10.0        ggplot2_1.0.0
[57] BiocInstaller_1.14.2

loaded via a namespace (and not attached):
  [1] affyio_1.32.0        affyPLM_1.40.1       annotate_1.42.0
  [4] base64_1.2           BatchJobs_1.2        BBmisc_1.7
  [7] beadarray_2.14.1     BeadDataPackR_1.16.0 bitops_1.0-6
[10] brew_1.0-6           Cairo_1.5-5          caTools_1.17
[13] checkmate_1.0        chron_2.3-45         cluster_1.15.2
[16] codetools_0.2-8      colorspace_1.2-4     compiler_3.1.0
[19] digest_0.6.4         fail_1.2             Formula_1.1-1
[22] gcrma_2.36.0         gdata_2.13.3         genefilter_1.46.1
[25] geneplotter_1.42.0   gmp_0.5-11           grid_3.1.0
[28] gridSVG_1.4-0        gtable_0.1.2         gtools_3.4.1
[31] Hmisc_3.14-4         hwriter_1.3          illuminaio_0.6.0
[34] KernSmooth_2.23-12   latticeExtra_0.6-26  MASS_7.3-33
[37] munsell_0.4.2        polynom_1.3-8        RCurl_1.96-0
[40] reshape2_1.4         RJSONIO_1.2-0.2      scales_0.2.4
[43] sendmailR_1.1-2      setRNG_2013.9-1      stats4_3.1.0
[46] survival_2.37-7      SVGAnnotation_0.93-1 tools_3.1.0
[49] vsn_3.32.0           XML_3.98-1.1         xtable_1.7-3
[52] zlibbioc_1.10.0
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