Spatio-temporal variogram error

Hi ben,
what is the solution to the problem am having?

On Fri, Feb 15, 2013 at 3:28 PM, Jonesmus Wambua 
<jonesmus.mutua at gmail.com <mailto:jonesmus.mutua at gmail.com>> wrote:

    no, he has not.


    On Fri, Feb 15, 2013 at 3:28 PM, Edzer Pebesma
    <edzer.pebesma at uni-muenster.de
    <mailto:edzer.pebesma at uni-muenster.de>> wrote:

        It seems Ben solved your problem, has he told you?



        -------- Original Message --------
        Subject:        Re: [R-sig-Geo] Spatio-temporal variogram error
        Date:   Fri, 15 Feb 2013 15:26:53 +0300
        From:   Jonesmus Wambua <jonesmus.mutua at gmail.com
        <mailto:jonesmus.mutua at gmail.com>>
        To:     Edzer Pebesma <edzer.pebesma at uni-muenster.de
        <mailto:edzer.pebesma at uni-muenster.de>__>



        Hi,
        here is the data, coordinates and code. the spatial variogram
        part of
        the code works but the spatio-temporal part doesn't work.

        Thanks for the help.
        regards.


        On Fri, Feb 15, 2013 at 2:16 PM, Edzer Pebesma
        <edzer.pebesma at uni-muenster.de
        <mailto:edzer.pebesma at uni-muenster.de>
        <mailto:edzer.pebesma at uni-__muenster.de
        <mailto:edzer.pebesma at uni-muenster.de>>>

        wrote:

            I can have a look if you send me the data, as .RData file,
        off-list.


            On 02/15/2013 09:26 AM, Jonesmus Wambua wrote:

                hi, am doing a spatio-temporal variogram and am
        getting this
                error below
                that i have no response variable in my data set even
        though it
                is there. my
                data am calling gdata and the response variable is
        pfpr. i have
                tried the
                code below with no access. the summary of my data is
        as follows:

                    summary(gdata)

                Object of class STFDF
                   with Dimensions (s, t, attr): (438, 21, 1)
                [[Spatial:]]
                Object of class SpatialPoints
                Coordinates:
                           min      max
                Long -16.718 -13.8500
                Lat   13.176  13.7915
                Is projected: NA
                proj4string : [NA]
                Number of points: 438
                [[Temporal:]]
                       Index              timeIndex
                   Min.   :1990-01-01   Min.   : 1
                   1st Qu.:1994-12-31   1st Qu.: 6
                   Median :1999-12-30   Median :11
                   Mean   :1999-12-30   Mean   :11
                   3rd Qu.:2004-12-28   3rd Qu.:16
                   Max.   :2009-12-27   Max.   :21
                [[Data attributes:]]
                     Min. 1st Qu.  Median    Mean 3rd Qu.    Max.    NA's
                      0.0     1.0     4.0    10.1    13.0   330.0    8640


                    s=variogram(gdata at data~1, gdata)


                    |

                    |
                                                 |   0%Error in
        .subset2(x, i,
                exact = exact)
                : no such index at level 1


                    s=variogram(pfpr~1, gdata)


                    |

                    |
                                                 |   0%Error in
                gstat.formula(d$formula,
                d$data) :
                    no response variable present in formula
                In addition: Warning messages:
                1: In min(x) : no non-missing arguments to min;
        returning Inf
                2: In max(x) : no non-missing arguments to max;
        returning -Inf
                3: In min(x) : no non-missing arguments to min;
        returning Inf
                4: In max(x) : no non-missing arguments to max;
        returning -Inf



                can anyone help?
                J

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