[R] read.table(..., header == FALSE, colClasses = <vector with names attribute>)

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Tue Oct 24 02:51:59 CEST 2017

You are constructing the equivalent of a two-line data file, and complaining that it is not treating it like it was one line. If it did used to accept this silently [skeptical] then I for one am glad it produces a warning now. 
Sent from my phone. Please excuse my brevity.

On October 23, 2017 2:53:21 PM PDT, Benjamin Tyner <btyner at gmail.com> wrote:
>I noticed that starting with R version 3.3.0 onward, this generates a 
>    > txt <- c("a", "3.14")
>   > read.table(file = textConnection(txt), header = FALSE, colClasses 
>= c(x = "character", y = "numeric"))
>the warning is "not all columns named in 'colClasses' exist" and I
>the change was made in response to this?
>    https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=16478
>Regardless, I am wondering whether this is desirable, that as a result 
>of the change, the code has become stricter about the presence of a 
>(formerly) harmless names attribute. Or am I missing something?
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>and provide commented, minimal, self-contained, reproducible code.

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