[BioC] Bioconductor Digest, Vol 87, Issue 10

[Saroj K Mohapatra]

Hi Avinash:

You could create a vector using c(), e.g., if the first 3 are control 
and last 3 are cancer, then,
 > myclassvec <- c(0,0,0,1,1,1)

For creating the gene name matrix, I hope you have the probe annotation 
file in which each probe (or probe set, for affy) is listed along with 
gene name, etc. From that select index, genename, id and save these 
three columns to another tab-delimited file (named say, myfile.tab). 
Keep no header. Read this file using read.table, e.g.,
 > mygnames <- read.table(file="myfile.tab", header=F, sep="\t")
Have a look at ?read.table for more help.

Good luck!

Saroj



avinash gupta wrote:
>   Saroj,
>                  thank you,
>  class vec: my colum lenth is 6 so  what is the code for make it .
>  genenames : i had download my data from in raw file and load  .cel 
> file in R after that i normailze it and make the object for make the 
> matrix data i use tah command:
> >expr<- exprs(obj) 
> after that what i do for creat the genenames matrix object, how to 
> creat 3 object and where to download the gene names and how to laos it 
> in genenames matrix object.plz mail me the code or manual for it .
>  
> thank u
>  
>  
> regards..
>  
> avinash