rowSums, rowMean and rowCumSums?
Hi, you can compute cumsums for each row with t(apply(x, 1, cumsum)) As this is a simple, direct implementation, I see no reason to make it a named function. Cheers -Felix 2009/7/31 Christophe Dutang <dutangc at gmail.com>:
Dear list, Don't you think it could be useful to have in R base a function rowCumSums, that compute cumulative sums for each row of a matrix? My implementation of rowCumSums is rowCumSums <- function(x) t(mapply(function(row)cumsum(x[row,]), 1:NROW(x))) I'm sure it can be improved to have other arguments like na.rm or dims. Is there any hope to have this function in R? Christophe -- Christophe Dutang Ph.D. student at ISFA, Lyon, France website: http://dutangc.free.fr ? ? ? ?[[alternative HTML version deleted]]
______________________________________________ R-devel at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
-- Felix Andrews / ??? Postdoctoral Fellow Integrated Catchment Assessment and Management (iCAM) Centre Fenner School of Environment and Society [Bldg 48a] The Australian National University Canberra ACT 0200 Australia M: +61 410 400 963 T: + 61 2 6125 1670 E: felix.andrews at anu.edu.au CRICOS Provider No. 00120C