R help - Jun 2008 - error in dat

Hello everyone,
I have the following code which keeps giving me an error.
The code is:
dat<-read.table(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisen.txt",header=T,row.names=1,blank.lines.skip=F,na..strings="NA")
dimnames(dat)((1)) <-as.character(dat(,1))
dat<-dat(,-1)
dat<-as.data.frame(dat)
file.show(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisen.txt")
ann<-read.table(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisenClasses.txt",header=T)
file.show(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisenClasses.txt")
cl<-as.character(ann[,2])
dat<-dat[,cl]
gc<-cl(1:19)
act<-cl(20:39)
x<-as.numeric(dat(2000,gc))
y<-as.numeric(dat(2000,act))
x<-x(!is..na(x))
y<-y(!is.na(y))
xy.list<-list(x,y)
boxplot(xy.list,col=c("red","blue"),main="Gene
2000")
The error is:   "error in eval .with.vis(expr, envir, enclos)  :
could not find function "dat"
I do not understand what this error is? Also is there a 
command to get a more verbose explanation of the error 
Any help would be appreciated
Paul



      
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Paul Adams wrote:
> Hello everyone,
> I have the following code which keeps giving me an error.
> The code is:
> dat<-read.table(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisen.txt",header=T,row.names=1,blank.lines.skip=F,na..strings="NA")
> dimnames(dat)((1)) <-as.character(dat(,1))
> dat<-dat(,-1)
> dat<-as.data.frame(dat)
> file.show(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisen.txt")
> ann<-read.table(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisenClasses.txt",header=T)
> file.show(file="C:\\Documents and Settings\\Owner\\My
Documents\\eisenClasses.txt")
> cl<-as.character(ann[,2])
> dat<-dat[,cl]
> gc<-cl(1:19)
> act<-cl(20:39)
> x<-as.numeric(dat(2000,gc))
> y<-as.numeric(dat(2000,act))
> x<-x(!is..na(x))
> y<-y(!is.na(y))
> xy.list<-list(x,y)
> boxplot(xy.list,col=c("red","blue"),main="Gene
2000")
> The error is:   "error in eval .with.vis(expr, envir, enclos)  :
> could not find function "dat"
you misuse the syntax, check the docs.  with 'dat(...)' r tries to apply
dat, but dat is a data frame, and is thus not applicable.  what you want
is dat[...].

you can argue that the error message is misleading;  unless you defined
one, r cannot find a function named 'dat', but it does find your data
frame, and it should complain about its non-applicability. 

vQ