sum in vector
Have a look at the reshape2 package. http://had.co.nz/reshape/ reshape2 is, to the user a slight modification of rehape but the author says it is much faster. The code below seems to do what you want. ------------------------------------------------------------- xx <- data.frame(market, price) library(reshape2) yy <- melt(xx, id=1) dcast(yy, market ~ variable, sum) -------------------------------------------------------------
--- On Sun, 11/14/10, lgpeco <pavic.olic at gmail.com> wrote:
From: lgpeco <pavic.olic at gmail.com> Subject: [R] sum in vector To: r-help at r-project.org Received: Sunday, November 14, 2010, 7:02 AM hy guys i have one question :) i have two vectors markets and price market <- c(1, 5, 7, 9, 9, 6, 5, 4, 4, 3, 1, 2, 1) price <- c(100, 20, 30, 10, 50, 23, 23, 33, 96, 6, 4, 38, 96) i would like sum prices: market 1: (100+4+96), market 2: (38),..., market 9: (10+50) ao i would like get this result: (200, 38, ..., 60) and i don't wanna use while, for loops... is there any other function to sum these :) tnx for helping ;) -- View this message in context: http://r.789695.n4.nabble.com/sum-in-vector-tp3041661p3041661.html Sent from the R help mailing list archive at Nabble.com.
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