Re: [R] the ifelse function

2007-05-06 Thread Peter Dalgaard
Jennifer Dillon wrote:
 Hi Everyone,

 I think I found a problem with the ifelse function:  If the condition
 argument is NA, it treats it as true.  Anyone agree or disagree with this?

 Jen
I don't see it doing that:

  ifelse(NA,1,0)
[1] NA

so what do you mean?

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[R] the ifelse function

2007-05-05 Thread Jennifer Dillon
Hi Everyone,

I think I found a problem with the ifelse function:  If the condition
argument is NA, it treats it as true.  Anyone agree or disagree with this?

Jen

-- 
Jennifer Dillon
Doctoral Student
Harvard Biostatistics
Room 414B, Building 1

[[alternative HTML version deleted]]

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Re: [R] the ifelse function

2007-05-05 Thread Chuck Cleland
Jennifer Dillon wrote:
 Hi Everyone,
 
 I think I found a problem with the ifelse function:  If the condition
 argument is NA, it treats it as true.  Anyone agree or disagree with this?

  I disagree.

 ifelse(c(5,4,NA) == 5, 1, 0)
[1]  1  0 NA

 Jen

-- 
Chuck Cleland, Ph.D.
NDRI, Inc.
71 West 23rd Street, 8th floor
New York, NY 10010
tel: (212) 845-4495 (Tu, Th)
tel: (732) 512-0171 (M, W, F)
fax: (917) 438-0894

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Re: [R] the ifelse function

2007-05-05 Thread jim holtman
Can you proovide the example you are talking about.  Here is what I got:

 ifelse(NA,1,2)
[1] NA


On 5/5/07, Jennifer Dillon [EMAIL PROTECTED] wrote:
 Hi Everyone,

 I think I found a problem with the ifelse function:  If the condition
 argument is NA, it treats it as true.  Anyone agree or disagree with this?

 Jen

 --
 Jennifer Dillon
 Doctoral Student
 Harvard Biostatistics
 Room 414B, Building 1

[[alternative HTML version deleted]]

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 R-help@stat.math.ethz.ch mailing list
 https://stat.ethz.ch/mailman/listinfo/r-help
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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