mode(x) mode(x) <- "<mode>" storage.mode(x) storage.mode(x) <- "<mode>"
mode and storage.mode provide means of determining the
type or storage mode of an object. Both return a character string
giving the (storage) mode of the object often the same both
relying on the output of typeof(x), see the example
below.
The two assignment versions are currently identical. Both
mode(x) <- newmode and storage.mode(x) <- newmode change
the mode or storage.mode of object x to
newmode.
typeof for the R-internal ``mode'',
attributes.
sapply(options(),mode)
cex3 <- c("NULL","1","1:1","1i","list(1)","data.frame(x=1)", "pairlist(pi)",
"args", "lm", "formals(lm)[[1]]", "formals(lm)[[2]]",
"y~x","(y~x)[[1]]", "expression(x <- pi)[[1]][[1]]")
lex3 <- sapply(cex3, function(x) eval(parse(text=x)))
mex3 <- t(sapply(lex3, function(x) c(typeof(x), storage.mode(x), mode(x))))
dimnames(mex3) <- list(cex3, c("typeof(.)","storage.mode(.)","mode(.)"))
mex3
## This also makes a local copy of `pi':
storage.mode(pi) <- "complex"
storage.mode(pi)
rm(pi)