Displaying 3 results from an estimated 3 matches for "pet1".
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net1
2011 Dec 08
1
partial duplicates of dataframe rows, indexing and removal
Hello. I am trying to remove from my dataframe, those rows in which the first
7 columns are duplicated even if subsequent columns make those rows unique.
df<-data.frame(id=rep(c('amy','bob','joe') , each=5),
pet1=sample(LETTERS[1:3],15, replace=T),
pet2=sample(LETTERS[1:3],15, replace=T),
pet3=sample(LETTERS[1:5],15, replace=T))
>df
id pet1 pet2 pet3
1 amy C B A
2 amy B A A
3 amy A A D
4 amy B C A
5 amy C B B
6 bob B A A
7 bob...
2008 May 30
4
Request: Documentation of formulae
In working through material on p.272 of MASS (4th ed.), I came
across the following model formula:
pet1.lm <- lm(Y ~ No/EP - 1, Petrol)
I was at a loss to understand the use of "/" until I looked in
"An Introduction [!] to R," where I found the explanation.
My request is that more complete material on model formulae be
lifted from "Introduction to R" (or elsewhere)...
2011 Nov 29
1
Problems with Raster and clim.pact packages with large netcdf files (2.7G) in x64 bit R
...RStudio\bin\x64\rsession.exe File: posixio.c,
Line 417 Expression: offset >= 0 This application has requested the Runtime
to terminate it in an unusual way.Please contact the application's support
team for more information.
here is an example of my code
library(raster)
library(clim.pact)
PET1<-brick("cru_ts_3_10.1901.2009.pet.dat.nc") #will give error
PET<-retrieve.nc("cru_ts_3_10.1901.2009.pet.dat.nc",x.rng=c(20,50),y.rng=c(-15,40))
#will give error
The files are CRU data downloaded from BADC. Smaller files work ok but
these are bigger file
1.
This i...