[R] how to set missing values in R

[James MacDonald]

x[x>0] <- NA



James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623

>>> Yulei He <yuleih at umich.edu> 10/27/03 04:05PM >>>
Hi, there.

Can I ask how to set up missing values in R? Suppose I want to assign
the
missing value to the elements in vector which is greater than zero
like
this:

x<-c(1,3,-1,0,4);

after the missing value assignment, x becomes (NA,NA,-1,0,NA).

Thanks!

Yulei


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Yulei He
1586 Murfin Ave. Apt 37
Ann Arbor, MI 48105-3135
yuleih at umich.edu 
734-647-0305(H)
734-763-0421(O)
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