Re: [R] ifelse for creating discriminating variable based on two conditions

reas Nord > Cc: r-help@r-project.org > Subject: Re: [R] ifelse for creating discriminating variable based on two > conditions > > Hi Andreas, > Try this: > > fruit_2sds<-by(data2$molecule,data2$fruit,sd)*2 > data2$newcol<-ifelse(data2$molecule>fruit_2sds[

Re: [R] ifelse for creating discriminating variable based on two conditions

Hi Andreas, Try this: fruit_2sds<-by(data2$molecule,data2$fruit,sd)*2 data2$newcol<-ifelse(data2$molecule>fruit_2sds[data2$fruit],1,0) or even just: data$newcol<-as.numeric(data2$molecule>fruit_2sds[data2$fruit]) Jim On Fri, Oct 14, 2016 at 5:17 PM, Andreas Nord wrote: > > Dear list, > > Apo

[R] ifelse for creating discriminating variable based on two conditions

Dear list, Apologies for a likely naive question. I am trying to create a discriminating dummy variable using 'ifelse' based on conditions in two variables. Specifically, I want to assign levels in a new factor as '0' or '1' based on a user-defined cut off. I.e. something similar to: >da