Odp: R-way to doing this?
Hi r-help-bounces at r-project.org napsal dne 23.12.2010 05:13:37:
Dear friends, hope I could be able to explain my problem through
following
example. Please consider this:
set.seed(1)
input <- rnorm(10)
input
[1] -0.6264538 0.1836433 -0.8356286 1.5952808 0.3295078 -0.8204684 0.4874291 0.7383247 0.5757814 -0.3053884
tag <- vector(length=10)
for(i in 1:10)
# if there is any ****error**** in evaluating "log(input[i])" (or
evaluating some function) then tag[i] = 1, otherwise tag[i] = 0
Therefore my "tag" vector should like: tag[1]=1, tag[2]=0, tag[3]=1,
tag[4]=0, tag[5]=0.......
Actually R returns logarithm of a negative number as NaN, however in
this
example please consider R returns error when it encounters logarithm of
a
negative number.
I do not understand above sentence well. R returns NaN not error. For error handling in loop use try or tryCatch. For simple vectorised function evaluation as log you can use is.* evaluation is.nan(log(input))*1 [1] 1 0 1 0 0 1 0 0 0 1 ifelse(is.nan(log(input)), 1,0) [1] 1 0 1 0 0 1 0 0 0 1 Regards Petr
Is there any way to do above task? Thanks and regards, [[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.