On Mon, 25 Oct 2004 15:56:37 +0200, Henrik Andersson
<[EMAIL PROTECTED]> wrote :
>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
>...
>@@Start Values@@
> Column1 Column2 Column3 ...
>Row1 1 2 3 ...
>...
>@@End Values@@
>
>More stuff
>...
>@@Start OtherValues@@
> Column1 Column2 Column3 ...
>Row1 1 2 3 ...
>...
>@@End OtherValues@@
>
>
>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?
I would avoid putting mixing multiple tables in the same file. I
think you'll run into fewer problems if you put each table into a
separate file, and generate an index file to list all the tables.
Each of the files in your scheme would then become a subdirectory in
my scheme.
If the multiplicity of files is a problem, you could use zip or winzip
to put them all into a zip file; R can extract a file from one of
those using zip.file.extract.
Duncan Murdoch
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