[R] Creating a new var from conditional values in other vars

[arun]

Hi,
Try this:
set.seed(25)
dat1<- data.frame(A=sample(1:30,100,replace=TRUE),B=sample(1:35,100,replace=TRUE),C=sample(1:25,100,replace=TRUE))


dat1$pattern<-with(dat1,ifelse(A>20 & B<=2.5 & C<=20,"Normal",ifelse(A <20 & B >2.5 & C >20,"Increased",ifelse(A >=20 & B >2.5 & C <=20,"Low","Other"))))
head(dat1)
#   A  B  C pattern
#1 13 20  5   Other
#2 21 15  4     Low
#3  5 24  1   Other
#4 27 13  6     Low
#5  4  4 10   Other
#6 30 19 22   Other
A.K.




I am newbie to R coming from SAS (basic user). Quite a difficult move.... 
I have a dataframe named kappa exported from csv file 
kappa<-read.csv("kappacsv", header=TRUE, sep=";", dec=".") 
kappa contains 3 numeric vars (A,B and C) 
I want to create a new var called "pattern" depending on the values of the conditions in A, B and C 
I have tried many ways one has been this: 
kappa$pattern1<-99 # create a new numeric var in kappa dataframe 

if (A>=20 & B<=2.5 & C <=20){kappa$pattern<-"Normal"} 
else if (A <20 & B >2.5 & C >20){kappa$pattern<-"Increased"} 
else if (A >=20 & B >2.5 & C <=20){kappa$pattern<-"Low"} 
else {kappa$pattern<-“Other”} 
  
The code does not work and I get errors all the time. 
Any help will be greatly appreciated 
Thanks