[R] write.table with append=T after using cat on same file

[William Dunlap]

Missing words:
  Use 'TRUE' and 'FALSE' instead of 'T' and 'F' >to avoid< this sort of
problem

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Mon, Jul 27, 2015 at 1:50 PM, William Dunlap <wdunlap at tibco.com> wrote:

> This will happen if you have redefined 'T':
>   > T <- 101:104
>   > write.table(df, file="junk.txt", sep=",", append=T, quote=F,
> row.names=F, col.names=F)
>   Error in file(file, ifelse(append, "a", "w")) : invalid 'open' argument
> Use 'TRUE' and 'FALSE' instead of 'T' and 'F' this sort of problem.
>
>
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
>
> On Mon, Jul 27, 2015 at 1:32 PM, Waichler, Scott R <
> Scott.Waichler at pnnl.gov> wrote:
>
>> Hi,
>>
>> For years I've been writing text to the beginning of files with
>> cat(append=F) , then following that text with data written by
>> write.table(append=T).  It is now giving me an error message.  I'm using
>> R-3.1.2.  What gives?
>>
>> df <- data.frame(x = 1, y = 1:10, z = 10:1)
>> cat(file="junk.txt", sep="", "# An introductory note.\n")
>> write.table(df, file="junk.txt", sep=",", append=T, quote=F, row.names=F,
>> col.names=F)
>>
>> Error in file(file, ifelse(append, "a", "w")) : invalid 'open' argument
>>
>> Thanks,
>> Scott Waichler
>> Pacific Northwest National Laboratory
>> Richland, WA  USA
>>
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>
>

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