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2007 Apr 05
1
data.frame backwards compatibility (PR#9601)
Full_Name: Victor Moreno Version: R2.5.0 OS: windows Submission from: (NULL) (68.40.63.169) This may not be a bug, but seems not yet documented. Some data.frames created with development version 2.5.0, when read in 2.4.1, show error: Error in dim.data.frame(chip23) : negative length vectors are not allowed A dump of the data.frame shows as last code: , row.names = as.integer(c(NA, -7269)), class = "data.frame") This seems related to the new feature of data.frames without rownames.