[R-sig-QA] [Fwd: create groups based upon different levels of 4 factors] update 1

[Mary A. Marion]

Hello to the R gurus,

My data is bound in a dataframe.
data2<-cbind.data.frame(digrp,gender, agegrp, bmigrp,wt)
data2[1:5,]

I want to create groups based upon different levels of 4 factors
ind<- as.logical ( (digrp=1) & (gender=1) & (agegrp="[20-35)") & 
(bmigrp="[0,18.5)" ) );

Error in (digrp = 1) & (gender = 1) & (agegrp = "[20-35)") :
 operations are possible only for numeric or logical types
>
I keep getting an error message.  How do I see that the above statement 
is in correct type format?
#operations are possible only for numeric or logical types.   why does 
it not include bmigrp?

Data was created as follows:

#BMI CLASSIFICATION
breaks<-c(0,18.5,25,30,200)
bmigrp<-cut(bmi,breaks=breaks,right=FALSE)

#AGE GROUPS
breaks<-c(1,35,60,90)
agegrp<-cut(age,breaks=breaks,right=FALSE)

#DI GROUPS
#1=yes has diabetes, 2=no does not have
digrp<-as.factor(join5[,"DIQ010"])

#GENDER GROUPS
#1=male, 2=female
gender<-as.factor(join5[,"RIAGENDR"])

#FORM DATA FRAME TO ANALYZE
data2<-cbind.data.frame(digrp,gender, agegrp, bmigrp,wt)
data2[1:5,]

Thanks.

Sincerely,
Mary A. Marion