Jeff,
Thank you for your reply. The intent was to construct a minimum
reproducible example. The same warning occurs when the 'file' argument
points to a file on disk with a million lines. But you are correct, my
example was slightly malformed and in fact gives an error under R
version 3.2.2. Please allow me to try again; in older versions of R,
> read.table(file = textConnection("a\t3.14"), header = FALSE,
colClasses = c(x = "character", y = "numeric"), sep="\t")
V1 V2
1 a 3.14
(with no warning). As of version 3.3.0,
> read.table(file = textConnection("a\t3.14"), header = FALSE,
colClasses = c(x = "character", y = "numeric"), sep="\t")
V1 V2
1 a 3.14
Warning message:
In read.table(file = textConnection("a\t3.14"), header = FALSE, :
not all columns named in 'colClasses' exist
My intent was not to complain but rather to learn more about best
practices regarding the names attribute.
Regards
Ben
On 10/23/2017 08:51 PM, Jeff Newmiller wrote:
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.
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