Hello,
Both Gabor's and my way work and produce the same results:
#-- Gabor
library(zoo)
library(chron)
data1 <- "
01:23:40 5
01:23:45 10
01:23:50 12
01:23:55 7"
data2 <- "
01:23:42
01:23:47
01:23:51
01:23:54
01:23:58
01:23:59"
data1zoo <- read.zoo(text=data1, FUN=times)
data2zoo <- read.zoo(text=data2, FUN=times)
na.approx(data1zoo, xout = time(data2zoo))
#-- Rui
data1 <- read.table(text = "
01:23:40 5
01:23:45 10
01:23:50 12
01:23:55 7
")
data2 <- read.table(text = "
01:23:42
01:23:47
01:23:51
01:23:54
01:23:58
01:23:59
")
approx(as.POSIXct(data1$V1, format = "%H:%M:%S"),
y = data1$V2,
xout = as.POSIXct(data2$V1, format = "%H:%M:%S"))
Note that the last two values of data2 are outside the range of data1,
and therefore the interpolation functions return nothing
(zoo::na.approx) or NA (stats::approx)
Hope this helps,
Rui Barradas
Em 18-01-2013 13:51, e-letter escreveu:
On 18/01/2013, Gabor Grothendieck <ggrothendi...@gmail.com> wrote:
On Fri, Jan 18, 2013 at 7:31 AM, e-letter <inp...@gmail.com> wrote:
On 16/01/2013, Rui Barradas <ruipbarra...@sapo.pt> wrote:
Hello,
Like this?
data1 <- read.table(text = "
01:23:40 5
01:23:45 10
01:23:50 12
01:23:55 7
")
data2 <- read.table(text = "
01:23:42
01:23:47
01:23:51
01:23:54
")
approx(as.POSIXct(data1$V1, format = "%H:%M:%S"), y = data1$V2, xout =
as.POSIXct(data2$V1, format = "%H:%M:%S"))
Thanks. I have later realised that if data frames are unequal (i.e.
data2edit
01:23:42
01:23:47
01:23:51
01:23:54
01:23:58
01:23:59
the result for 'y' is
$y
[1] NA NA NA NA NA NA
Similar error occurs with the 'zoo' package.
its not clear precisely what you tried with zoo but have a look at this:
data1 <- "
+ 01:23:40 5
+ 01:23:45 10
+ 01:23:50 12
+ 01:23:55 7"
data2 <- "
+ 01:23:42
+ 01:23:47
+ 01:23:51
+ 01:23:54"
library(zoo)
library(chron)
z1 <- read.zoo(text = data1, FUN = times)
z2 <- read.zoo(text = data2, FUN = times)
na.approx(z1, xout = time(z2))
01:23:42 01:23:47 01:23:51 01:23:54
7.0 10.8 11.0 8.0
Latest error:
data1
V1 V2
1 01:23:40 5
2 01:23:45 10
3 01:23:50 12
4 01:23:55 7
data2
V1
1 01:23:42
2 01:23:47
3 01:23:51
4 01:23:54
5 01:23:58
6 01:23:59
data1zoo<-read.zoo(text=data1,FUN=times)
Error in textConnection(text) : invalid 'text' argument
data2zoo<-read.zoo(text=data2,FUN=times)
Error in textConnection(text) : invalid 'text' argument
Then I tried to create objects differently:
data1zoo<-read.zoo('test1.txt',FUN=times)
data1zoo
01:23:40 01:23:45 01:23:50 01:23:55
5 10 12 7
data2zoo<-read.zoo('test2.txt',FUN=times)
data2zoo
01:23:42
01:23:47
01:23:51
01:23:54
01:23:58
01:23:59
data3<-(na.approx(merge(data1zoo,data2zoo),time(data1zoo)))
Error in na.approx.default(object, x = x, xout = xout, na.rm = FALSE, :
x and index must have the same length
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
