From spencer.graves at prodsyse.com  Sun Jan 18 02:18:43 2009
From: spencer.graves at prodsyse.com (Spencer Graves)
Date: Sat, 17 Jan 2009 17:18:43 -0800
Subject: [Rd] DierckxSpline segfault
In-Reply-To: <5f0660120901171059v8032701k4dfa9994afe44a17@mail.gmail.com>
References: <5f0660120901171059v8032701k4dfa9994afe44a17@mail.gmail.com>
Message-ID: <49728373.5070308@prodsyse.com>

      Thanks for this bug report.  I've replicated the problem using 
your excellent example.  Unfortunately, this may not be an easy bug to 
fix. 

      Might it be feasible for you to use either the 'periodicSpline' 
function in the 'splines' package or a Fourier basis in the 'fda' package? 

      Best Wishes,
      Spencer Graves

?????? ????????? wrote:
> I've just encountered a segfault when using DierckxSpline::percur
> function. Below is the minimal example which triggers the error:
>
> ---
>
> library(DierckxSpline)
> x <- 1:10
> y <- rep(0, 10)
> pspline <- percur(x, y)
>
> ---
>
>  *** caught segfault ***
> address (nil), cause 'memory not mapped'
>
> Traceback:
>  1: .Fortran("percur", iopt = as.integer(iopt), m = as.integer(m),
> x = as.single(x), y = as.single(y), w = as.single(w), k = k,     s =
> as.single(s), nest = as.integer(nest), n = as.integer(n),     knots =
> Knots, coef = coef, fp = single(1), wrk = wrk, lwrk = lwrk,     iwrk =
> iwrk, ier = integer(1))
>  2: curfitSS(xyw, s = s, knots = knots, n = n, from = From, to = To,
>   k = k, periodic = periodic, ...)
>  3: curfit.default(x, periodic = TRUE, ...)
>  4: curfit(x, periodic = TRUE, ...)
>  5: percur(x, y)
>
> Possible actions:
> 1: abort (with core dump, if enabled)
> 2: normal R exit
> 3: exit R without saving workspace
> 4: exit R saving workspace
> Selection:
>
> ---
>
> Package:       DierckxSpline
> Type:          Package
> Title:         R companion to "Curve and Surface Fitting with Splines"
> Version:       1.1-2
> Date:          2007-7-31
> Author:        Sundar Dorai-Raj
> Maintainer:    Sundar Dorai-Raj <sundar.dorai-raj at pdf.com>
> Description:   This package provides a wrapper to the FITPACK routines
>                written by Paul Dierckx. The original Fortran is
>                available from http://www.netlib.org/dierckx
> License:       GPL (>= 2)
> Depends:       R (>= 2.4.0), stats, lattice, PolynomF
> Suggests:      fda, splines
> Packaged:      Sun Jan 11 13:08:12 2009; spencerg
> Built:         R 2.8.1; i486-pc-linux-gnu; 2009-01-17 10:21:01; unix
>
> ---
>
> I'm ready to provide any additional info,
> Andrey
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
>



[Rd] DierckxSpline segfault
Spencer Graves