Dear Joris,

Thank for your comments. Changing importFrom("zoo", rollmax) to importFrom("zoo", rollmax, rollmax.default) solved the problem.

Best regards,

Thierry

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx@inbo.be<mailto:Thierry.Onkelinx@inbo.be>
www.inbo.be<http://www.inbo.be/>

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

Van: Joris Meys [mailto:jorismeys@gmail.com]
Verzonden: maandag 28 januari 2013 11:27
Aan: ONKELINX, Thierry
Onderwerp: Re: [Rd] incorrect import?

'rollmax' is a generic S3 method, and the point of that is to be visible to the user. If you only import the generic, it can't find the methods as they still reside in the namespace of 'zoo', which you neither imported nor attached to the search path. So either you import also the relevant methods, or you just load the zoo package using Depends instead of Imports and import.

Cheers
Joris
On Mon, Jan 28, 2013 at 11:10 AM, ONKELINX, Thierry <Thierry.ONKELINX@inbo.be<mailto:Thierry.ONKELINX@inbo.be>> wrote:
Dear all,

I'm not getting what I'm doing wrong. The line below from my read.fsa.bin function throws an error when just loading my AFLP package and disappears when I load the zoo package as well.

#the line that throws the error
Index <- which(Peak == rollmax(Peak, k = 1 + 2 * floor((min(diff(SizeStandard)) * Fs - 1) / 2), fill = -Inf))
#the error
Error in UseMethod("rollmax") :  no applicable method for 'rollmax' applied to an object of class "c('double', 'numeric')"

DESCRIPTION of the AFLP package contains
Imports: ggplot2, mvtnorm, seqinr, zoo, signal, xtable, vegan

The NAMESPACE contains
importFrom("zoo", rollmax)

What am I missing?

The source files are available on https://r-forge.r-project.org/scm/?group_id=1027

Best regards,

Thierry

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51<tel:%2B%2032%202%20525%2002%2051>
+ 32 54 43 61 85<tel:%2B%2032%2054%2043%2061%2085>
Thierry.Onkelinx@inbo.be<mailto:Thierry.Onkelinx@inbo.be>
www.inbo.be<http://www.inbo.be>

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey


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Joris Meys
Statistical consultant

Ghent University
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Department of Mathematical Modelling, Statistics and Bio-Informatics

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