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
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