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timvink/package installed test

Created October 9, 2013 14:05
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Test whether package is installed. If not, install. Then Load. example use: pkgTest("ggplot2") instead of normal library("ggplot2").
Raw
package installed test
pkgTest <- function(x)
{
if (!require(x,character.only = TRUE))
{
install.packages(x,dep=TRUE, repos="http://cran-mirror.cs.uu.nl/")
if(!require(x,character.only = TRUE)) stop("Package not found, cannot be installed")
}
}
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