Hello everyone,
I have two problems which I am unable to solve :
1.I am trying to add the  row labels (g1-g2000) to the very left of a data table. The data
table is 2000 rows  by 62 columns.I have used the following code.
read.table(file="C:\\Documents and Settings\\Owner\\My Documents\\colon cancer1.txt",header=T,row.names=1)
rowname(dat) <- paste("g", c(1:nrow(dat)), sep="")
file.show(file="C:\\Documents and Settings\\Owner\\My Documents\\colon cancer1.txt")
The error message I get is "error in nrow(dat):object "dat" not found
2.I am also trying to populate a scatter plot with data from two columns which are 2000 values 
long.I have tried the following code:
read.table(file="C:\\Documents and Settings\\Owner\\My Documents\\colon cancer1.txt",header=T,row.names=1)
file.show(file="C:\\Documents and Settings\\Owner\\My Documents\\colon cancer1..txt")
plot(50,1500,type='p',xlab='normal',ylab='tumor',main='Tumor sample vs.Normal Sample-2000genes')
plot(50,1500,type='p',xlab='normal1',ylab='normal2',main='Two normal samples--first 20 genes',pch=15,col='blue')
plot(dat(,1), dat(,2))
I get the following error message  "error in plot (dat(,1),dat(,2)  could not find function dat
I am not sure how I am  suppossed to use function dat that is where and how to define it to the table?
Any help would be appreciated.
Paul


      
	[[alternative HTML version deleted]]

