[R] plotting big zoo object memory problem

From: stephen sefick <ssefick_at_gmail.com>
Date: Wed, 05 Mar 2008 10:00:31 -0500

the comma seperated file is 37Mb, and I get the below message: it is zoo object read in this way:

# chron
> library(chron)
> fmt.chron <- function(x) {
+ chron(sub(" .*", "", x), gsub(".* (.*)", "\\1:00", x)) + }
> z1 <- read.zoo("all.csv", sep = ",", header = TRUE, FUN = fmt.chron)

and then the plot is done with:

> plot(z2[, c(2, 15, 28, 41, 54, 67, 80, 93, 106)], main="SpCond 9/6/06 on", xlab="Date")

and the resulting warning message:

Warning messages:
1: In attr(x, "index") <- attr(x, "oclass") <- attr(x, "frequency") <- NULL :   Reached total allocation of 502Mb: see help(memory.size) 2: In attr(x, "index") <- attr(x, "oclass") <- attr(x, "frequency") <- NULL :   Reached total allocation of 502Mb: see help(memory.size)

it still plots the file. I am currently limited to my computer at work with only 504Mb of RAM (windows), and my computer at home with 1Gb of RAM (Macintosh). But I will probably be using my work computer for a lot of analysis on this data set (and it will become marginally larger). Will this be a problem? I am a biologist not a computer scientist.
thanks for the help

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annoying little problems of being mammals.

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Received on Wed 05 Mar 2008 - 15:04:49 GMT

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