On Mon, 20 May 2002 dciemo@excite.com wrote:
Full_Name: David Ciemiewicz Version: 1.3.1 OS: Windows 2000 Submission from: (NULL) (63.192.218.208) In the R Language Manual (R-lang.pdf), section 3.2.1 "if", there is an example expression which uses the function "any".
if( any(x) <= 0 ) y <- log(1+x) else y <- log(x) y <- if( any(x)<= 0 ) log(1+x) else log(x)
However, the parenthesis are incorrect in the conditional part of the if.
It should be:
if ( any(x <= 0) ) y <- log(1+x) else y <- log(x)
y <- if ( any(x <= 0) ) log(1+x) else log(x)
Yes, fixed for 1.5.1, thanks.
However, if we are really being pedantic, this is still not correct. If any values of x are <= -1, you will still get an error.
But that may be the intention: the intention is not explained. Or it may be already known that x > -1. Not that log(0) is not an error (it is -Inf) so only x < -1 would generate an error.
I'm still too new to R to figure out how to get what I thing I really want which would set all values less than or equal to zero to be 1.
x[x <= 0] <- 1
Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._