[Rcpp-devel] Fwd: CRAN package ConConPiWiFun

I have a new problem with my package 
It seems that my example fails on windows devel version and some others. 

According to email below from Prof Brian Ripley 
"running under valgrind does not report a problem" and it crashes while using my "plot method"

plot(CCPWLfunc1$Swap(y)); #now f = CCPWLfunc1 is replaced by x -> f(y-x)

Error in plot(CCPWLfunc1$Swap(y)) :
   error in evaluating the argument 'x' in selecting a method for 
function 'plot': Error in .External(list(name = 
"CppMethod__invoke_notvoid", address = <pointer: 0x1c1ff90>,  :
   first argument must be a string (of length 1) or native symbol reference

but there are several preceding example where the "plot methods" work successfully. In addition I tried everything with the R devel version on my computer with windows and got no crash... 
any idea where this comes from ? note that I'm using "RCPP_EXPOSED_CLASS(cplfunction)" 
and I declare the plot method with something starting by:
"setMethod( "plot", signature(x="Rcpp_cplfunction",y="ANY") , function(x,y,...) {  ..." 

maybe I should send a version of my package with no example to pass checks ?
 
Robin

----- Mail transf?r? -----
De: "Prof Brian Ripley" <ripley at stats.ox.ac.uk>
?: CRAN at r-project.org
Cc: "Uwe Ligges" <Uwe.Ligges at r-project.org>, "Robin Girard" <robin.girard at mines-paristech.fr>
Envoy?: Mardi 15 Janvier 2013 17:05:26
Objet: Re: CRAN package ConConPiWiFun

Dear package maintainer of ConConPiWiFun,

please see

http://cran.r-project.org/web/checks/check_results_ConConPiWiFun.html

and find that this crashed both under R-oldrelease and R-devel for
Windows (and I guess it just passed by chance under R-release). Since
this also fails under Solaris and Mac for other reasons, you may want to
fix the Windows problems at least.

I also see failures on Linux boxes.  For example on the Fedora check 
system under R-patched (the same machine for which the results are up 
under R-devel).  OTOH, running under valgrind does not report a problem.

### Name: ConConPiWiFun-package
### Title: This package contains an implementation of continuous convex
###   piecewise (linear) functions (quadratic coming soon)
### Aliases: ConConPiWiFun-package ConConPiWiFun Sum cplfunction
###   Rcpp_cplfunction-class plot-methods plot,ANY-method
###   plot,Rcpp_cplfunction-method show-methods show,ANY-method
###   show,Rcpp_cplfunction-method
### Keywords: Optimisation, Dynamic programming

### ** Examples

library(ConConPiWiFun)
##
#Construction of a piecewise linear function
##
Slopes=c(-1,2) # increasing ! convexity is required
Breakpoints=c(-Inf,2,4) # increasing. length is number of slopes +1
FirstNonInfBreakpointVal=3
CCPWLfunc1=new(cplfunction,Slopes,Breakpoints,FirstNonInfBreakpointVal)
plot(CCPWLfunc1) #visualisation method
CCPWLfunc1$get_BreakPoints_() ## return Breaks AND Slopes

$Breakpoints
[1] -Inf    2    4

$Slopes
[1] -1  2

###Etoile transformation (legendre transform of f)
# Changes f + returns the results !
plot(CCPWLfunc1$Etoile())  #if f = CCPWLfunc1 CCPWLfunc1 becomes is

f^*(y) =inf_x {xy-f(x)}

plot(CCPWLfunc1$Etoile())  ## (f^*)^* is f !

###Squeeze function
# Changes f, no return!
left=-1; right=4
CCPWLfunc1$Squeeze(left,right) # CCPWLfunc1 is now infinite (or not

definite) out of [left,right]

# i.e. all breakpoints out of [left,right] removed


###Swap function
# Changes f  + returns the results !
y=2
plot(CCPWLfunc1$Swap(y)); #now f = CCPWLfunc1 is replaced by x -> f(y-x)

Error in plot(CCPWLfunc1$Swap(y)) :
   error in evaluating the argument 'x' in selecting a method for 
function 'plot': Error in .External(list(name = 
"CppMethod__invoke_notvoid", address = <pointer: 0x1c1ff90>,  :
   first argument must be a string (of length 1) or native symbol reference

Please upload a fixed versions of the package with increased version
number to CRAN in the usual way and report to cran at R-project.org.

Best,
Uwe Ligges

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595