Henrik Andersson <h.andersson <at> nioo.knaw.nl> writes:
:
: I am about to write general functions to read the output of simulations
: models.
:
: These model generate output files with different sections which I want
: to analyze plot etc.
:
: Since this will be used many people at the department I wanted to make
: sure that will do this in the best way.
:
: For instance I want to read a snippets of data from a text that look
: like this.
: -------------------------------
: Lots of stuff
: ...
: <at> <at> Start Values <at> <at>
: Column1 Column2 Column3 ...
: Row1 1 2 3 ...
: ...
: <at> <at> End Values <at> <at>
:
: More stuff
: ...
: <at> <at> Start OtherValues <at> <at>
: Column1 Column2 Column3 ...
: Row1 1 2 3 ...
: ...
: <at> <at> End OtherValues <at> <at>
:
:
: I looked in the help files and found grep which operates on character
: strings, do I have to like this then?
:
: 1. Read file with readLines("foo.txt")
: 2. grep this object for the start and end of each section ->startline &
: stopline
: 3. Read the file again with
: read.table("foo.txt",skip=startline,nrows=stoplin-startline)
:
: Or is there a more beautiful way?
You could adapt the following to your situation (i.e. multiple sections
rather than just one):
https://www.stat.math.ethz.ch/pipermail/r-help/2003-November/040184.html
Also regarding your example, one potential gotcha to be aware of is
that skip= skips lines but nrow= counts rows of the data frame so they
are slightly different concepts.
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