It does round to 3 digits, but since the last one is a zero, is only prints
5.43 and not 5.430. Why do you want the last zero? Is this going into a
report or something? You can always use sprintf:
> x <-round(5.43, 3)
> x
[1] 5.43
> sprintf("%.3f", x)
[1] "5.430"
>
BTW you are converting your numeric vector back to character with
statements like:
if(vec.num[i] < 0) {
vec.num[i] <- "LO"
What is the problem you are trying to solve?
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
On Wed, Jul 15, 2015 at 6:26 AM, Luigi Marongiu
wrote:
> Dear all,
> I have a vector that comes from some calculations I am making and this
> vectors turns out to be in character format rather than numerical. I
> can convert it in numerical format but then the calculations are not
> correct, as you can see in the following example. I was also expecting
> that rounding a number such as 5.43 to a three digits one would return
> 5.430 but that did not happen. Any tips on how to apply the
> calculation correctly?
> Thank you
> best regards
> luigi
>
> >>>
> vec.ori <- c("5.43", "6.63", "-1.18593063116494e+36", "6.2", "5.61",
> "4.96842801255869e+30", "5.59", "-Inf", "Inf", "5.49", "18.35",
> "-3.11", "6.07", NA)
>
> vec.num <- as.numeric(vec.ori)
>
> vec.num <0
>
> [1] FALSE FALSE TRUE FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE
> TRUE FALSENA
>
> vec.num >0
>
> [1] TRUE TRUE FALSE TRUE TRUE TRUE TRUE FALSE TRUE TRUE TRUE
> FALSE TRUENA
>
> for(i in 1:length(vec.num)) {
> cat("value at beginning: ", vec.num[i], "\n", sep="")
> if(vec.num[i] < 0) {
> vec.num[i] <- "LO"
> } else if(vec.num[i] > 45) {
> vec.num[i] <- "HI"
> } else if (is.na(vec.num[i])== TRUE) {
> vec.num[i] <- "na"
> } else if (is.infinite(vec.num[i]) == TRUE) {
> vec.num[i] <- "INF"
> } else {
> vec.num[i] <- round(vec.num[i], 3)
> }
> cat("value at end: ", vec.num[i], "\n", sep="")
> }
>
> value at beginning: 5.43
> value at end: 5.43
> value at beginning: 6.63
> value at end: 6.63
> value at beginning: -1185930631164940020264024442864400022
> value at end: LO # REM: error!
> value at beginning: 6.2
> value at end: HI # REM: error!
> value at beginning: 5.61
> value at end: HI # REM: error!
> value at beginning: 4968428012558689723622822000404
> value at end: HI
> value at beginning: 5.59
> value at end: HI # REM: error!
> value at beginning: -Inf
> value at end: LO # REM: error!
> value at beginning: Inf
> value at end: HI # REM: error!
> value at beginning: 5.49
> value at end: HI # REM: error!
> value at beginning: 18.35
> Error in round(vec.num[i], 3) :
> non-numeric argument to mathematical function
> # REM: cycle crashed
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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