Hi all, There is a compatibility issue between the package 'lme4' and my package 'kml'. I define the "[" operator. It works just fine in my package (1). If I try to use the lme4 package, then it does no longer work (2). Moreover, it has some kind of strange behavior (3). Do you know what is wrong? Any idea of how I can correct that?
Here is a reproductible example, and the same code with the result follows. Thanks for your help Christophe --- 8< ----------------- Code for reproductible example ------------------- library(kml) ### Creating some data dn <- gald(1) dn["traj"] ### using lme4 library(lme4) dn["traj"] ### Re-defining the "[" setMethod( ### Simplified version ### "[", signature=signature(x="ClusterLongData", i="character", j="ANY",drop="ANY"), definition=function (x, i, j="missing", ..., drop = TRUE){ x <- as(x, "LongData") return(x[i, j]) } ) dn["traj"] dn["traj"] --- 8< ----------------- Execution of the previous code ------------------- > library(kml) Le chargement a nécessité le package : clv Le chargement a nécessité le package : cluster Le chargement a nécessité le package : class Le chargement a nécessité le package : longitudinalData Le chargement a nécessité le package : rgl Le chargement a nécessité le package : misc3d > dn <- gald(1) ########### ### (1) the "[" operator works just fine > dn["traj"] t0 t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 i1 -3.11 4.32 2.17 1.82 4.90 7.34 0.83 -2.70 5.36 4.96 3.16 i2 -7.11 1.40 -2.40 -2.96 4.31 0.50 1.25 0.52 -0.04 7.55 5.50 i3 2.80 6.23 6.08 2.87 2.58 2.88 6.58 -2.38 2.30 -1.74 -3.23 i4 2.24 0.91 6.50 10.92 11.32 7.79 7.78 10.69 9.15 1.07 -0.51 ########### ### (2) using 'lme4', it does no longer work > library(lme4) Le chargement a nécessité le package : Matrix Le chargement a nécessité le package : Rcpp > dn["traj"] Error in x[i, j] : erreur d'évaluation de l'argument 'j' lors de la sélection d'une méthode pour la fonction '[' : Erreur : l'argument "j" est manquant, avec aucune valeur par défaut ########### ### (3) If I define again the "[", it does not work the first time I call it, but it work the second time! > setMethod( + "[", + signature=signature(x="ClusterLongData", i="character", j="ANY",drop="ANY"), + definition=function (x, i, j="missing", ..., drop = TRUE){ + x <- as(x, "LongData") + return(x[i, j]) + } + ) [1] "[" ### No working the first time I use it > dn["traj"] Error in dn["traj"] : l'argument "j" est manquant, avec aucune valeur par défaut ### But working the second time > dn["traj"] t0 t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 i1 -3.11 4.32 2.17 1.82 4.90 7.34 0.83 -2.70 5.36 4.96 3.16 i2 -7.11 1.40 -2.40 -2.96 4.31 0.50 1.25 0.52 -0.04 7.55 5.50 i3 2.80 6.23 6.08 2.87 2.58 2.88 6.58 -2.38 2.30 -1.74 -3.23 i4 2.24 0.91 6.50 10.92 11.32 7.79 7.78 10.69 9.15 1.07 -0.51 -- View this message in context: http://r.789695.n4.nabble.com/S4-operator-Compatibility-issue-between-lme4-and-kml-tp4708236.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.