cherche femme du kirghizstan Prevent drop dimension attribute by drop = FALSE.
test.matrix <- matrix(1:15, nc=5) > test.matrix[1, ] [1] 1 4 7 10 13 > test.matrix[1, , drop=FALSE] [,1] [,2] [,3] [,4] [,5] [1,] 1 4 7 10 13
Tag: R
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Subscripting in R * [ gives the same …
Subscripting in R
[ gives the same data type as the data it is applied to.
[[ and $ extract the element and the data type is not necessarily the same as that of the data it is applied to.$ does partial matching.
[ and [[ don’t.$ does not evaluate.
[ and [[ evaluate their arguments. -
declare a list and adding an element in …
declare a list and adding an element in R
test.list <- list() test.list[['key']] <- value # adding an element test.list[['key']] # retrieve the element
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R plot with examples http://www.hardi …
R plot with examples
http://www.harding.edu/fmccown/r/
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Title for muti plots in R mtext(‘Title …
Title for muti plots in R
mtext(‘Title’, outer=TRUE) -
search() list loaded packages.
search()
list loaded packages.
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vector -> lapply -> list array, matrix …
vector -> lapply -> list
array, matrix -> apply -> vector, array, list -
Using a value of a variable in title …
Using a value of a variable in title
Use paste and eval.
plot(x, main = paste("Cluster", eval(i)) -
Links: Clustering methods in R Cluste …
Links: Clustering methods in R
Clustering using standard R functions
http://www.statmethods.net/advstats/cluster.htmlUsing heatmat and heatmap.2
http://www2.warwick.ac.uk/fac/sci/moac/students/peter_cock/r/heatmap/Drawing k-means clusters on heatmap and introducing pheatmap
http://stackoverflow.com/questions/5084077/r-draw-kmeans-clustering-with-heatmap -
Calling R from Perl Statistics::R ht …
Calling R from Perl
Synopsis
use Statistics::R; my $R = Statistics::R->new(); $R->startR; $R->send(q`postscript("file.ps" , horizontal=FALSE , width=500 , height=500 , pointsize=1)`); $R->send(q`plot(c(1, 5, 10), type = "l")`); $R->send(q`dev.off()`); $R->send(qq`x = 123 \n print(x)`); my $ret = $R->read; print "\$ret : $ret\n"; $R->stopR();