User:Timothee Flutre/Notebook/Postdoc/2011/11/09: Difference between revisions
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(→Entry title: replace rownames with mapping when different order) |
m (→Entry title: mention R "replace") |
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new.rownames <- unlist(lapply(rownames(mat), function(i){links$id2[which(links$id1 == i)]})) | new.rownames <- unlist(lapply(rownames(mat), function(i){links$id2[which(links$id1 == i)]})) | ||
rownames(mat) <- new.rownames | rownames(mat) <- new.rownames | ||
Or it's maybe easier with the built-in [http://stat.ethz.ch/R-manual/R-patched/library/base/html/replace.html replace] function. | |||
<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### --> | <!-- ##### DO NOT edit below this line unless you know what you are doing. ##### --> | ||
Revision as of 14:38, 9 November 2011
 Project name
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Entry title
links <- data.frame(id1=c("a","b","c"), id2=c("1","2","3"), stringsAsFactors=FALSE)
mat <- matrix(runif(3*10), nrow=3)
rownames(mat) <- c("b","c","a")
new.rownames <- unlist(lapply(rownames(mat), function(i){links$id2[which(links$id1 == i)]}))
rownames(mat) <- new.rownames
Or it's maybe easier with the built-in replace function. | |
