R-helpers: I'm trying to build a package, but I'm a bit new to the whole S3/S4 methods concept. I'm trying to add a new definition of the zoo function "as.yearmon", but I'm getting the following error when it gets to this point during a package install:
*** R CMD INSTALL STARStools * installing to library ‘/Library/Frameworks/R.framework/Versions/2.13/Resources/library’ WARNING: omitting pointless dependence on 'R' without a version requirement * installing *source* package ‘STARStools’ ... ** R ** inst ** preparing package for lazy loading Loading required package: sp raster version 1.9-5 (28-July-2011) Geospatial Data Abstraction Library extensions to R successfully loaded Loaded GDAL runtime: GDAL 1.8.0, released 2011/01/12 Path to GDAL shared files: /Library/Frameworks/GDAL.framework/Versions/1.8/Resources/gdal Loaded PROJ.4 runtime: Rel. 4.7.1, 23 September 2009 Path to PROJ.4 shared files: (autodetected) Attaching package: 'zoo' The following object(s) are masked from 'package:base': as.Date Creating a new generic function for "as.Date" in "STARStools" Creating a new generic function for "as.list" in "STARStools" Error in setGeneric(f, where = where) : must supply a function skeleton, explicitly or via an existing function Error : unable to load R code in package 'STARStools' ERROR: lazy loading failed for package ‘STARStools’ * removing ‘/Library/Frameworks/R.framework/Versions/2.13/Resources/library/STARStools’ * restoring previous ‘/Library/Frameworks/R.framework/Versions/2.13/Resources/library/STARStools’ *** # Note that these "require" statements do not appear in the code, but appear in the DESCRIPTION file: require("sp") require("zoo") # Here are the class definitions (filename AAAclassdefinitions.R): setClass("SpatialPointsDataFrameList",representation(list="list"),contains=c("SpatialPointsDataFrame")) setClass("SpatialPointsDataFrameListZoo",contains=c("SpatialPointsDataFrameList")) # And here is where it is getting hung up. filename "as.yearmon.SpatialPointsDataFrameListZoo_SpatialPointsDataFrameListZoo.R" setMethod("as.yearmon", signature(x = "SpatialPointsDataFrameListZoo"), as.yearmon.SpatialPointsDataFrameListZoo ) # Filename "as.yearmon.SpatialPointsDataFrameListZoo.R" as.yearmon.SpatialPointsDataFrameListZoo=function(x,...) { newlist=mapply(zoo:::as.yearmon,x@list,MoreArgs=list(...),simplify=FALSE) x@list=newlist return(x) } Thoughts? --j -- Jonathan A. Greenberg, PhD Assistant Project Scientist Center for Spatial Technologies and Remote Sensing (CSTARS) Department of Land, Air and Water Resources University of California, Davis One Shields Avenue Davis, CA 95616 Phone: 415-763-5476 AIM: jgrn307, MSN: jgrn...@hotmail.com, Gchat: jgrn307 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.