Hi all, 

I am having some trouble with expression sets created by the GEOquery package from GEO series matrix files. There seems to be a problem with parsing featureNames.

I begin by downloading a series matrix file:

data <- getGEO(GEO="GSE63252",destdir=getwd())

> eset <- data[[1]]
> eset
ExpressionSet (storageMode: lockedEnvironment)
assayData: 54675 features, 27 samples 
  element names: exprs 
protocolData: none
phenoData
  sampleNames: GSM1544474 GSM1544475 ... GSM1544500 (27 total)
  varLabels: title geo_accession ... data_row_count (33 total)
  varMetadata: labelDescription
featureData
  featureNames: 1007_s_at 1053_at ... NA.17590 (54675 total)
  fvarLabels: ID GB_ACC ... Gene Ontology Molecular Function (16 total)
  fvarMetadata: Column Description labelDescription
experimentData: use 'experimentData(object)'
Annotation: GPL570 

The expression sets created in this way have missing feature names after row 37085.

> featureNames(eset)[37084]
[1] "227829_at"
> featureNames(eset)[37085]
[1] "NA"
> featureNames(eset)[37086]
[1] "NA.1"
> featureNames(eset)[50000]
[1] "NA.12915"

This happens with all series matrix files, not just with this one, BUT everything is fine when creating expression sets from GDS records. Thanks so much in advance for any help.

Kamila

> sessionInfo()
R version 3.1.3 (2015-03-09)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.10.3 (Yosemite)

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   parallel  stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] affy_1.44.0         siggenes_1.40.0     multtest_2.22.0     GEOquery_2.32.0     Biobase_2.26.0      BiocGenerics_0.12.1

loaded via a namespace (and not attached):
 [1] affyio_1.34.0         BiocInstaller_1.16.4  bitops_1.0-6          MASS_7.3-40           preprocessCore_1.28.0 RCurl_1.95-4.5        stats4_3.1.3          survival_2.38-1      
 [9] tools_3.1.3           XML_3.98-1.1          zlibbioc_1.12.0