On 13-05-2012, at 15:08, Jonsson wrote:
> Dear All,
>
> I am trying to replace a value of 528.8933 to -9999 in my file
>
> t<- file("C:\\Users\\Amin\\Desktop\\1999n_Resample11.img", "rb")
> e=readBin(t, double(), size=4,n=720*360, signed=TRUE)
> e[e != -9999] <- e[e != -9999]*0.0099 + 477.65 -273.15
>
> This code given above would read a binary file . Then It would do some
> clculations to e. That worked well. I opend the file again in order to
> look at the results and I found weird numbers ( 528.8933).
>
> I then used this line >e[e == 528.8933] <- -9999 to replace
> the value of 528.8933 by -9999. I got no errors but when I looked again at
> the values, I found them as they were(528.8933 is still there)
> any idea on how to replace a value by another value?Thanks in advance
>
Please read the R FAQ section 7.31 "Why doesn't R think these numbers are
equal?"
http://cran.r-project.org/faqs.html
http://cran.r-project.org/doc/FAQ/R-FAQ.html
Berend
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