[R] Working directories... Again
Dear R forum, I've looked many places for this and figure there must be an easy way to implement. I want to set the working directory in my script to the place where the R code is located. Something like: setwd(directory where this script is found). Thanks! -Allen -- View this message in context: http://n4.nabble.com/Working-directories-Again-tp1571058p1571058.html Sent from the R help mailing list archive at Nabble.com. __ R-help@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.
[R] Lyapunov matrix equation
Dear R forumers, Wondering if anyone knows of a package that can solve the lyapunov matrix equation C=ACA^T + B in R? Currently I am exporting to Mathematica, solving and bringing the results back in, but this is not ideal. Can R do this? Thanks in advance, Allen -- View this message in context: http://n4.nabble.com/Lyapunov-matrix-equation-tp1008389p1008389.html Sent from the R help mailing list archive at Nabble.com. __ R-help@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.
[R] Class attributes
Dear R forum,
I want to replace all the elements in a data frame (dd) which match the
character x with 0.
What's the most elegant way of doing this (there must be an easy way which
I've missed)? I settled on the following loop:
for(i in 5:12){# These are the column of dd I am interested
in
dd[which(dd[,i]==x),i]-0
}
The problem with this is that the columns which used to contain x are
still considered factors and I am unable to coerce them into numeric:
mean.species.biomass-colMeans(as.numeric(dd.p[,5:12]))
Error in inherits(x, data.frame) :
(list) object cannot be coerced to type 'double'
I'm tried unclassing reclassing, other functions etc. but nothing seems to
work. What is wrong?
Thanks in advance,
Allen
--
View this message in context:
http://n4.nabble.com/Class-attributes-tp948693p948693.html
Sent from the R help mailing list archive at Nabble.com.
__
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and provide commented, minimal, self-contained, reproducible code.
