On May 31, 2010, at 9:14 PM, jim holtman wrote:
This is the case where '\t' is the tab character; '\\t' would give you
the backslash followed by 't' which is not what you want.
Both versions "worked" in the sense of returning the number of the
line with "\tBegin Main\t"
> txt <- "\n\tBegin Main\t"
> in.str <- readLines(textConnection(txt))
> grep("\tBegin", in.str)
[1] 2
> grep("\\tBegin", in.str)
[1] 2
It's possible that Newmiller's explanation contained the answer but it
was too abstract for me to really grasp.
--
David.
On Mon, May 31, 2010 at 8:19 PM, David Winsemius <dwinsem...@comcast.net
> wrote:
On May 31, 2010, at 8:14 PM, jim holtman wrote:
try this:
input <- readLines("yourfile.txt")
# determine start
start <- grep("\tBegin Main\t", input)[1] # first line if many
Puzzled. I thought backslashes in grepping patterns needed to be
doubled? I
guess not.
--
David.
if (length(start) == 1 && (start > 1)){
input <- tail(input, -(start - 1)) # delete heading lines
}
# find lines you want to delete
breaks <- grep("\tBreak\t", input)
if (length(breaks) > 0){
input <- input[-breaks]
}
# now read in your data
real_input <- read.table(textConnection(input), header=TRUE)
closeAllConnections()
On Mon, May 31, 2010 at 7:51 PM, Kevin Burnham
<kburn...@gmail.com> wrote:
I am trying to import a series of text files generated by stimulus
presentation software. The problem that I am having is that the
number
of
rows I need to skip is not fixed (depending on subject's pretest
behavior)
nor is the first row of the data I want always the same (the
stimuli were
presented in random order). So I need to bring in the .txt file
(using
readLines?), look for the row containing the text "Begin
Main" (see exact
row below) and start reading data to a table from that point.
[13] "Main Group\t1000\tBegin Main\tBegin Main\tBegin Main\t\t
\tPressed\t(any response)\tC\t25860\t\t\t\t\t"
I would also like it to ignore the row:
[173] "Main Group\t1000\tBreak\tBreak\
tpause3\t\t \tPressed\t(any response)\tC\t47610\t\t\t\t\t"
which will always be the same number of rows after the "Begin
Main" row.
Thanks,
Kevin Burnham
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PLEASE do read the posting guide
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--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem that you are trying to solve?
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
