[R] R does not recognise columns and rows as they are supposed to be

[William Dunlap]

Is the file format documented?

If not you can search for a possible format if you know the values
at the start of the file.   For one of your files, show the results of the following:
  file <- "your filename here"
  for(what in c("double", "integer")) {
    for(size in c(4, 8)) {
        for(endian in c("little", "big")) {
        cat(sep="", what, "/", size, "/", endian, ":\n   ");
        print(readBin(file, what=what, size=size, endian=endian, n=6))
      }
    }
  }
Do any of them look ok?  If not you may want to loop over possible
offsets in the file by opening a connection, reading from 1 to 7 one-byte
integers, and then reading the data of interest.


Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf
> Of Jonsson
> Sent: Thursday, May 24, 2012 11:41 PM
> To: r-help at r-project.org
> Subject: Re: [R] R does not recognise columns and rows as they are supposed to be
> 
> Yes I exactly followed what you all suggested:
> X<-(82:92) ; Y<-(364:369) #####   for sellected region
> > extract <- double(365)
> > setwd("C:\\Users\\aalyaari\\Desktop\\New folder (10)\\")
> > listfile<-dir()
> > for (i in 1:365) {
> +       conne <- file(listfile[i], "rb")
> +       file1<- readBin(conne, double(),  n=360*720)
> +      file2<-matrix(data=file1,ncol=720,nrow=360)
> +      extract[i]<-mean(file2[X,Y],na.rm=TRUE)
> +       close(conne) }
>  write.table(extract,"C:\\Users\\aalyaari\\Desktop\\New folder
> (10)\\samregion1.txt")
> 
> But I  am still getting(negative values) all values like:
> 
>             -3.75E+306
>             -1.30E+54
>             -1.22E+58
> and the right ones should be like:
>               22.25
>               22.76
>               33.25
> 
> --
> View this message in context: http://r.789695.n4.nabble.com/R-does-not-recognise-
> columns-and-rows-as-they-are-supposed-to-be-tp4631217p4631279.html
> Sent from the R help mailing list archive at Nabble.com.
> 
> ______________________________________________
> R-help at 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.