On 13-06-23 5:54 AM, Søren Højsgaard wrote:
Dear all,
Given a number
x<-1.234e12
is there a built-in function for extracting 1.234 and 12 ?
I don't think so, but it is not hard to build them from log10:
mantissa <- function(x) {
if (x == 0) 0
else {
log <- log10(abs(x))
10^(log - floor(log))
}
}
exponent <- function(x) {
if (x == 0) 0
else floor(log10(abs(x)))
}
Duncan Murdoch
The following "hack" seems clumpsy:
a<-strsplit(format(x, scientific=T),"e")[[1]]
a
[1] "1.234" "+12"
as.numeric(a[1])
[1] 1.234
as.integer(a[2])
[1] 12
Regards
Søren
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