Hi lalitha,

You can try this way. I think it should solve the problem. 

Data looks like this

 Y    X1 
 1     1  
 2     1 
 3     0 
 4     1 
 5     1 
 6     1 

anal.data <- read.table("file.txt", header=T)\
attach(anal.data)

## objective is to change the value 1 in column X1 to Gamma

anal.data$X1 <- replace(anal.data$X1,anal.data$X1==1,"Gamma")

anal.data

this should replace all the "1"'s with Gamma. Hope this helps.

Sincerely



"However bad life may seem, there is always something you can do and succeed at. While there is life, there is hope." Stephen Hawking

Anup Menon Nandialath
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