R help - Aug 2014 - (no subject)

Hi all.

I am having problems with inheritance in reference class, here is a small
example:

Myclass = setRefClass("Myclass",
                       fields = list(
                           fa = "numeric",
                           fb = "numeric",
                           filename = "character",
                           data = "data.frame"
                       ))


Myclass$methods(
    initialize = function(fa = 0, fb = 0, filename = "") {
        message("Initializing object in class...")
        .self$fa = fa
        .self$fb = fb
        .self$data = read.table(.self$filename, header=TRUE)
    })

# Myclass1 = setRefClass("Myclass1",#                        fields
list(#                            fc = "numeric"#
  ),#                        contains = "Myclass"# )# #
Myclass1$methods(#     initialize = function(..., fc = 0) {#
message("Initializing object in class1...")#         callSuper(...)#
      .self$fc = fc#     }# )# # Myclass2 = setRefClass("Myclass3",#
                     fields = list(#                            fd
"numeric"#                        ),#                        contains
= "Myclass1"# )# # Myclass2$methods(#     initialize = function(...,
fe = 0) {#         message("Initializing object in class2...")#
 callSuper(...)#         .self$fe = fe#     }# )

This loads ok. But if you uncomment the subclasses R will complain when
loading:

==> R CMD INSTALL --no-multiarch --with-keep.source testLoadRef
* installing to library
?/Library/Frameworks/R.framework/Versions/3.1/Resources/library?*
installing *source* package ?testLoadRef? ...** R** preparing package
for lazy loading
Initializing object in class...
Error in file(file, "rt") : invalid 'description' argument
Error : unable to load R code in package ?testLoadRef?
ERROR: lazy loading failed for package ?testLoadRef?* removing
?/Library/Frameworks/R.framework/Versions/3.1/Resources/library/testLoadRef?*
restoring previous
?/Library/Frameworks/R.framework/Versions/3.1/Resources/library/testLoadRef?

Exited with status 1.


Best regards,

Kaiyin ZHONG
________________________________
FMB, Erasmus MC
http://kaiyin.co.vu
k.zhong at erasmusmc.nl
kindlychung at gmail.com

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