[R] Error in ops.factor: check and verify

[arun]

HI,
I just answered to one with similar contents but with a different title.  I guess both are the same.

A.K.



----- Original Message -----
From: Sapana Lohani <lohani.sapana at ymail.com>
To: R help <r-help at r-project.org>
Cc: 
Sent: Tuesday, August 28, 2012 5:41 PM
Subject: [R] Error in ops.factor: check and verify

Hi, may be i was not clear when I made this query before.


I have 6 columns in my dataframe (test)


A B C D E F
a b c d 40 30
a f a b 20 10
x m y m 50 30

I want a new column which gets value in E if character value in column A matches with that in column C. One more column comparing B and D. It gets the percentage in F column if value in column B matches the value in D. If it doesn't match, it gets 0 percentage. 

I tried the ?with, ?within and ?ifelse as suggested but am getting the error saying "Error in Ops.factor(test$A, test$C) : level sets of factors are different" How do i fix this ?


Basically I want my result to look like 


A B C D E F new_column_1 new_column_2

a b c d 40 30 0 0

a f a b 20 10 20 0

x m y m 50 30 0 30
thanks
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