I don't have the Kendall package at my fingers, but it seems like you have
some deeper trouble with R syntax if you are writing things like
MannKendall(1:27(data),data)
when you know that MannKendall only takes one argument.
Can you verify that your data object actually has a full set of data to it?
(use some combination of length(),nrow(),dput(),head(),tail() etc)
For a general tip, data() is a function to R so its not the best idea for an
object name. Outside chance that might be what's causing your problem.
Michael Weylandt
On Fri, Sep 2, 2011 at 11:35 AM, ScottM <scott.mcgrane@abdn.ac.uk> wrote:
> Hi there,
>
> I'm trying to apply the Mann Kendall test for trend analysis of a time
> series. I have downloaded and installed the package Kendall and
> subsequently loaded it into the software.
>
> My time series is a .txt file with 2 columns - column 1 is the year (1985 -
> 2009) and column 2 is the corresponding entry variable.
>
> According to the R guidelines, the call should be:
>
> MannKendall(x) [whereby x is a data vector, usually a time series]
>
> As such, I've loaded in my file 'data.txt' and then called on:
>
> MannKendall(data), to which I get the following:
>
> Error in Kendall(1:length(x), x) : length(x)<3
>
> What do I need to do to get beyond this highly annoying error? I've
tried
> MannKendall(1:27(data), data), but then keep getting this:
>
> Error in Kendall(1:length(x), x) : attempt to apply non-function
>
> Any help greatly received!
>
> S
>
> --
> View this message in context:
>
http://r.789695.n4.nabble.com/Mann-Kendall-Test-for-Trend-tp3786392p3786392.html
> Sent from the R help mailing list archive at Nabble.com.
>
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