[R] insert/copy skipped lines to output
muhammad.rahiz at ouce.ox.ac.uk
Sun Mar 28 18:51:18 CEST 2010
Thanks for the tip. It works but I'd like to improve on the way I did it.
x <- array(1:50,dim=c(10,10)) # data
h1 <- c("ncols 180") # header, line 1
h2 <- c("nrows 290") # header, line 2
h3 <- c("xllcorner -200000") # header, line 3
h4 <- c("yllcorner -200000") # header, line 4
h5 <- c("cellsize 5000") # header, line 5
h6 <- c("NODATA_value NA") # header, line 6
h0 <- rbind(h1,h2,h3,h4,h5,h6)
The header should display as;
> have a look at the documentation of the different output functions
> (write(),cat(),write.table()). Most of them have an argument like
> "append". If you set this to TRUE, your command adds the lines you are
> writing into the file to the lines already existent in that file. So if
> you run this write() command first with your additional data (header
> data) and then with the "real" data and append=TRUE, your information
> ends up in the same file.
> Muhammad Rahiz schrieb:
>> Hello all,
>> I'd like some advise on this. When I read my files, I pass the
>> argument, skip=6, to skip 6 lines of header information. After
>> performing the desired calculations, I have the output. Now I want to
>> copy the 6 lines of skipped information to the output.
>> What I've been doing so far is to use a shell script (i.e. the cat
>> function) to copy the header information to the output file. This
>> means I need 2 additional files, namely a file containing the header
>> information only, and the shell script to run the the function.
>> Is there a direct way to perform this in R?
>> The following forms the main component of my R script;
>> x <- as.matrix(read.table("file.txt",skip=6))
>> y <- x*2
>> R-help at r-project.org mailing list
>> PLEASE do read the posting guide
>> and provide commented, minimal, self-contained, reproducible code.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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