1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
checkRVersion <- function(quiet=FALSE)
{
page <- scan(file="http://cran.r-project.org/src/base/R-2", what="", quiet=TRUE)
matches <- grep("R-[0-9]\\.[0-9]+\\.[0-9]+", page, value=TRUE)
versionList <- gsub("^.*R-([0-9].[0-9]+.[0-9]+).*$","\\1",matches)
versionList <- numeric_version(versionList)
if( max(versionList) > getRversion() )
{
if(!quiet)
{
cat("A newer version of R is now available: ")
cat(as.character(max(versionList)))
cat("\n")
}
invisible( max(versionList) )
}
else
{
if(!quiet)
{
cat("The latest version of R is installed: ")
cat(as.character(max(versionList)))
cat("\n")
}
invisible( NULL );
}
}
|
