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primary_dev
2008 Oct 17
2
using ifelse with surprising results
Thanks for the gracious assistance in advance
I'm working on a non-metric scaling problem and am calculating the distance
for input to isoMDS
Here is the code
library(MASS)
vegdata <- tapply(Percent, list(PRIMARY_VE, MASTERID), sum)
x.mat <- matrix(x, nrow=40, ncol=2750, byrow=TRUE, dimnames =
c(dimnames(x)[1], dimnames(x)[2]))
vegdata.dd <- dist(x)
vegdata.dd <- ifelse(vegdata.dd==NA, 0.01, x.dd)
vegdata.dd
Everything works as expected until I try to replace the NA values in the
distance matri...