[R-sig-Geo] space time error message

Fri Aug 8 18:39:52 CEST 2014

Thanks; mentioning which packages provide the commands you mention in
your requests for help is another absolute requirement to get people to
help you.

In particular in this case, as it concerned a non-cran packge: meteo, on
r-forge; http://r-forge.r-project.org/projects/meteo/ .

On 08/08/2014 03:32 PM, Ahmadou Dicko wrote:
> I agree with everyone, you need to provide a reproducible example if you
> want people to help you.
> I don't know where you found the meteo2STFDF function, but you can use the
> spacetime package to build a STFDF
> 
> library(spacetime)
> library(rgdal)
> 
> load("dprec84.rda")
> load("stations1.rda")
> 
> coordinates(stations1) <- c("lon", "lat")
> proj4string(stations1) <- CRS("+init=epsg:4326")
> 
> time <- as.POSIXct(unique(dprec84$date))
> stfdf <- STFDF(stations1, time, data = dprec84[, "prec", drop = FALSE])
> 
> Feel free to read the vignette (vignette("jss816")) to know more about the
> spacetime package.
> 
> Just a quick question, though is this source of precipitation data publicly
> available for researcher (Senegal) ?
> 
> Hope it helps
> 
> 
> 
> 
> On Fri, Aug 8, 2014 at 1:07 PM, Milan Kilibarda <milan.kili11 at gmail.com>
> wrote:
> 
>> Dear Abdoulaye,
>>
>> Regarding to your Error message, I guess you should check if the time
>> format in your observation set was appropriate. In spacetime package
>> POSIXct is preferable. See  ? as.POSIXct, for easy converting from
>> string to POSIX* format. If you still have problem, than you should
>> send at least  str(dprec84) and str(stations1), or even better make
>> small subset in mail of your data, then people from the list could try
>> to reproduce the problem; try to find solution; and it can help
>> someone with a similar problem.
>> Best,
>> Milan
>>
>>> prec <- meteo2STFDF(dprec84,stations1, crs= CRS('+proj=longlat
>> +datum=WGS84'))
>> Joining by: staid, date
>>
>> Joining by: staid
>> Error in  ST(sp, time, endTime) : time is not a time based class
>>
>> On Fri, Aug 8, 2014 at 1:55 PM, Abdoulaye Sarr <abdoulayesar at gmail.com>
>> wrote:
>>> I am still hoping to have a quick explanation on what is causing the
>> error
>>> or a suggestion on another way to do it?
>>>
>>> Cheers,
>>> eus
>>>
>>>
>>> On Sun, Aug 3, 2014 at 2:20 PM, Abdoulaye Sarr <abdoulayesar at gmail.com>
>>> wrote:
>>>
>>>> I think the problem could be related to dates in precip, in fact here I
>> am
>>>> using dekadal precip( 10 days average therefor for each month you have
>> 01,
>>>> 11 and 21 as you can see in the date in sample dataframes dprec84.rda
>> and
>>>> the stations1.rda.
>>>>
>>>> After creating these dataframes I am trying to use use meteo to create a
>>>> STFDF (I guess other packaged could do it?) using the command below:
>>>>
>>>>> prec <- meteo2STFDF(dprec84,stations1, crs= CRS('+proj=longlat
>>>> +datum=WGS84'))
>>>> Joining by: staid, date
>>>>
>>>> Joining by: staid
>>>> Error in  ST(sp, time, endTime) : time is not a time based class
>>>>
>>>> If doable with other package also will be fine for me.
>>>>
>>>> asarr
>>>>
>>>>
>>>> On Sun, Aug 3, 2014 at 9:40 AM, Edzer Pebesma <
>>>> edzer.pebesma at uni-muenster.de> wrote:
>>>>
>>>>> Please provide a small, reproducible example.
>>>>>
>>>>> Wbr,
>>>>>
>>>>> On 07/26/2014 08:29 PM, Abdoulaye SARR wrote:
>>>>>>
>>>>>> Hello list,
>>>>>>
>>>>>> I am creating a space time full data frame but having this error
>>>>> message:
>>>>>>
>>>>>> Joining by: staid
>>>>>> Error in ST(sp, time, endTime) : time is not a time based class
>>>>>>
>>>>>> the data frame 10 days average precip used looks like this:
>>>>>>
>>>>>>      staid       time prec
>>>>>> 1 38007200 1984-01-01  0.0
>>>>>> 2 38008400 1984-01-01  0.8
>>>>>> 3 38014000 1984-01-01  0.0
>>>>>> 4 38008100 1984-01-01  0.0
>>>>>> 5 38008700 1984-01-01  0.0
>>>>>> 6 38009200 1984-01-01  0.0
>>>>>>
>>>>>>
>>>>>> The next date 1984-01-11 etc..
>>>>>>
>>>>>> could someone help solve this urgent issue.
>>>>>>
>>>>>> Best regards,
>>>>>>
>>>>>> eus
>>>>>>
>>>>>>
>>>>>>       [[alternative HTML version deleted]]
>>>>>>
>>>>>> _______________________________________________
>>>>>> R-sig-Geo mailing list
>>>>>> R-sig-Geo at r-project.org
>>>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>>>
>>>>>
>>>>> --
>>>>> Edzer Pebesma
>>>>> Institute for Geoinformatics (ifgi), University of MÃ¼nster
>>>>> HeisenbergstraÃŸe 2, 48149 MÃ¼nster, Germany. Phone: +49 251
>>>>> 83 33081 http://ifgi.uni-muenster.de GPG key ID 0xAC227795
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> R-sig-Geo mailing list
>>>>> R-sig-Geo at r-project.org
>>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>>
>>>>>
>>>>
>>>
>>>         [[alternative HTML version deleted]]
>>>
>>>
>>> _______________________________________________
>>> R-sig-Geo mailing list
>>> R-sig-Geo at r-project.org
>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>
>>
>>
>>
>> --
>> Dr. Milan Kilibarda
>> Assistant professor
>> University of Belgrade,
>> Faculty of Civil Engineering,
>> Department of Geodesy and Geoinformatics,
>> Address: Bulevar kralja Aleksandra 73  11000 Belgrade, Serbia,
>> Mail:  kili at grf.bg.ac.rs
>> Web: http://www.grf.bg.ac.rs/fakultet/pro/e?nid=168 ;
>> http://dailymeteo.org/
>> Pub: http://scholar.google.com/citations?user=Zl2MZ3AAAAAJ&hl=en
>> tel:+381 11 3218630
>>
>> _______________________________________________
>> R-sig-Geo mailing list
>> R-sig-Geo at r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>
> 
> 
> 
> 
> 
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> 

-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Heisenbergstraße 2, 48149 Münster, Germany. Phone: +49 251
83 33081 http://ifgi.uni-muenster.de GPG key ID 0xAC227795

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