?apply e.g. for the 'min'
apply(yourMatrix, 1, min, na.rm=TRUE) On Thu, Jan 29, 2009 at 11:58 AM, Will Glass-Husain <[email protected]> wrote: > Hi, > > I'm a new user. I've been reading through the manual and looking at > various examples but am still trying to make sense of the most > efficient ways to handle matrices of data. > > If I have a 2D matrix of data, how do I get the mean, min, max value > of each row? I see the "mean" function on a matrix will give me > averages by row, but min and max give me the value for the entire > matrix. I want the min (for example) of each row. pmin looks useful, > but I can't seem to get the syntax right to apply to each column. > > Right now I am doing this. Is there a one-liner that would work instead? > > minResult <- vector (mode="list", length=rowCount) > for (row in 1:rowCount) > { > minResult[[row]] <- min(corResult[row], na.rm = TRUE) > } > > Thanks in advance. > > WILL > > ______________________________________________ > [email protected] 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ [email protected] 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.
