[R] package zoo, function na.spline with option maxgap -> Error: attempt to apply non-function?

[Gabor Grothendieck]

On Wed, Jun 6, 2012 at 4:40 PM, May Katharina
<may.katharina at googlemail.com> wrote:
> On Jun 6, 2012, at 10:19 , Gabor Grothendieck wrote:
>
>> On Wed, Jun 6, 2012 at 3:55 PM, May Katharina
>> <may.katharina at googlemail.com> wrote:
>>> Hello,
>>>
>>> I'm trying to use na.spline (package zoo) to fill some missing data in a time series.
>>> this works fine, however, if I apply the 'maxgap' argument, I always get the error:
>>> <------
>>> Error in na.spline.vec(x., coredata(object.), xout = xout., ...) :  attempt to apply non-function
>>> ------>
>>>
>>> I couldn't find a similar error for this case in the mailing lists and zoo vignette, I hope I didn't
>>> miss any basic thing, but as I don't know how to proceed, any help on why this isn't working
>>> is very much appreciated  (I guess I don't have to mention I'm new to time series & zoo and that I'm terrible sorry if this is
>>> an absolute dull question).
>>>
>>> The data I use is rather large, but the error can be reconstructed in a small example (s. below).
>>> If of any interest: I use R 2.15.0 GUI 1.51 Leopard build 32-bit (6148).
>>>
>>> Many thanks and best regards, Katharina
>>>
>>>

Yes, it seems that that bug hid a second bug and I have now hopefully
removed both.  Try this (or download and build the zoo package from
R-Forge):

> library(zoo)
>
> # source revised code
> source("http://r-forge.r-project.org/scm/viewvc.php/*checkout*/pkg/zoo/R/na.spline.R?root=zoo")
> source("http://r-forge.r-project.org/scm/viewvc.php/*checkout*/pkg/zoo/R/na.approx.R?root=zoo")
> na.spline(z, maxgap = 2)
1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
   1    2    3    4   NA   NA   NA    8    9   10   11   12   13   14   NA   NA
1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929
  NA   18   19   20   21   22   23   24   25   26   27   28   29   30
>


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