[datatable-help] Transform characters to numbers and compare

[Arunkumar Srinivasan]

Please don't cross-post:
http://stackoverflow.com/questions/23047280/transform-characters-to-numbers

Arun

From: Sergio.pv serpalma.v at gmail.com
Reply: Sergio.pv serpalma.v at gmail.com
Date: April 13, 2014 at 9:36:35 PM
To: datatable-help at lists.r-forge.r-project.org datatable-help at lists.r-forge.r-project.org
Subject:  [datatable-help] Transform characters to numbers and compare  

I have a data.frame of two vectors.  

df <- data.frame(G1=c("b","a","e","d","c"),  
G2=c("c","d","e","b","a"))  
You can see that both vectors have the same characters, but in diferent  
order. I want to convert them into numbers and then compare them.  

To compare G2 to G1, G1 must be the reference, so the output will be this:  

df2 <- data.frame(G1=c("1","2","3","4","5"),  
G2=c("5","4","3","1","2"))  
Is there a way to do this?, thanks  



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