apply function over same column of all objects in a list
I'm a little confused on your data structure -- can you use dput() as described here [1] to give a small reproducible example? http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example Michael
On Wed, Aug 1, 2012 at 10:38 AM, gail <ortoga-r at yahoo.de> wrote:
Thank you!!! But I realise I've simplified my data to the point that your solution doesn't actually work -- not your fault, mine! My list is actually more complicated than what I presented it to be; it's not composed of numerical matrices but of lists, each being composed of 7 columns, the first two of each (the ones that I am interested in, x and y) being numerical. This is what my list really looks like (truncated):
summary(mylist)
Length Class Mode moh6 7 density list moh7 7 density list moh8 7 density list ... etc.
summary(mylist[[3]]) # I've taken number 3 as an example, but they're all the same
Length Class Mode x 512 -none- numeric y 512 -none- numeric bw 1 -none- numeric n 1 -none- numeric call 2 -none- call data.name 1 -none- character has.na 1 -none- logical Any suggestion how to get the max of column y for each sub-list (moh6, moh7, moh8 etc.), and to the max of all these individual maxes? By the way, lapply(list1,FUN=function(x)x[,2][which.max(x[,2])]) gives me the individual maxes (for a list composed of numerical matrices), but how do I get to the overall max?
Possibly max(unlist(list1)) if I understand you correctly.
Many thanks ... -- View this message in context: http://r.789695.n4.nabble.com/apply-function-over-same-column-of-all-objects-in-a-list-tp4638681p4638705.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ 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.