Maybe you can use "round" and "trunc" functions
For example if you have a vector like this:
x<- c(3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000)
and you want to round the numbers to 2 decimals you can use:
round(x,2)
[1] 3.00 3.12 3.25 3.38 3.50 3.62 3.75 3.88 4.00
if you want a numeric vector containing the integers formed by
truncating the values in x
trunc(x)
[1] 3 3 3 3 3 3 3 3 4
I'hope it'is useful to you
A.C.
Def. Quota Rui Barradas <ruipbarra...@sapo.pt>:
Hello,
As for truncation, you can write a one line function:
dec_trunc <- function(x, digits = 0) trunc(x * 10^digits)/10^digits
As for approximation, maybe you're looking for ?signif.
Hope this helps,
Rui Barradas
Em 17-07-2013 18:41, Francesco Miranda escreveu:
What is the function to do the truncation to a certain decimal
digit of a number. And the function approximation?
Thanks.
Francesco M
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