Create variable with AND IF statement

Hello,

I'm using SPSS at work but really would like to switch to R. Right  
now I'm
trying to learn R in reproducing calculations I did with SPSS but am  
stuck
with something that is quite simple and comprehensible in SPSS-Syntax:

IF (variable1.fac = 0 AND variable2.num = 0) variable3=1.
IF (variable1.fac = 0 AND variable2.num >= 1) variable3=2.
IF (variable1.fac = 1 AND variable2.num = 0) variable3=3.
IF (variable1.fac = 1 AND variable2.num >= 1) variable3=4.
I want to create four different groups out of different conditions  
of two
variables:
 * variable1.fac is a factor coded with 0 and 1
 * variable2.num is a numerical variable with only whole numbers

My problem with R is that I can't find a way to use AND in an IF  
statement
that doesn't produce an error or not intended solutions.

"An Introduction to R" is really unhelpful with this problem and I  
wouldn't
have written here, if I didn't have searched for the answer.

Do you not find the 'ifelse' function described in "An Introduction to  
R" in the section regarding "if".
http://tolstoy.newcastle.edu.au/R/help/05/09/12136.html was helpful in
understanding how the IF statement is written in R but didn't answer  
my
question how to add an usable AND (&, |)
Not the best answer I have ever seen in the archives. But if you had  
followed up by reading further in the thread you would have found the  
correct approach.
https://stat.ethz.ch/pipermail/r-help/2008-November/178808.html looked
promising but didn't do what I had intended
(I think the results of interaction( variable1.fac = 0 , variable2.num  
= 0) should have dome very nicely, but if you wanted them a naked  
numbers then this would have also givne satisfaction:

var3 <- as.numeric( interaction( variable1.fac = 0 , variable2.num =  
0) )
David
>
> Thanks in advance,
> Richard
>
> 	[[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT

Create variable with AND IF statement

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