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I installed jpeg package and tried to use kim<-readJPEG("kim.jpeg") to read in a jpeg file, but R gave me an error: Error in readJPEG("kim.jpeg") : unable to open kim.jpeg I already put "kim.jpeg" in Rstudio's default working directory: "E:\home work\Rstudio". So I don't think it's a problem caused by omitting the file's path. But I

Hi all, I want to transform a dCgMatrix from package Matrix into a matrix.csr from package SparseM, and I found out this link : http://stat.ethz.ch/R-manual/R-devel/library/Matrix/html/SparseM-conv.html But there's no informaion about usage/description/arguments, so how do I use this SparseM-conversions method ?? Is it a function ?? By the way I already tried function: as.spam.matrix.csr

Hi all, When I called arrayIndex(20:23, dim=c(4,3,3)), it says "Error: could not find function "arrayIndex"in R". So I called ls("package:utils") to see the functions inside: [1] "?" [2] "adist" [3] "alarm" [4] "apropos" [5] "aregexec" [6] "argsAnywhere" [7] "arrangeWindows" [8]