MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Re: Compatibility woes

  • To: mathgroup at
  • Subject: [mg76276] Re: [mg76190] Re: Compatibility woes
  • From: "Chris Chiasson" <chris at>
  • Date: Fri, 18 May 2007 06:35:02 -0400 (EDT)
  • References: <f2btsp$iha$> <f2em96$2pm$>

If you don't mind every argument to FindRoot being evaluated before
FindRoot "sees" them, then you could do:





On 5/17/07, Mark Adler <madler at> wrote:
> On May 16, 3:26 am, Mark Adler <mad... at> wrote:
> > I doubt that I have plumbed the depths of the
> > incompatibilities, since the rate of discovery is not decreasing.
> In this case, I hate being right.  The latest 5.2 to 6.0
> incompatibility showed up in FindRoot[].  A relatively complicated
> function used in a FindRoot[] worked just dandy in 5.2, but now in 6.0
> I get complaints due to how and when the function is executed.  Trying
> Release[] or Hold[] around the function results in exactly the same
> errors.  Providing two starting points to avoid computing a Jacobian
> also results in no change.  The function itself works fine when
> executed on its own.  Putting it in a FindRoot[] is what exposes the
> errors.  Example errors are below.
> I am spending much more time than I like trying to get things to work
> again that worked just fine before upgrading.  So far, this one is
> turning out to be one of the tougher nuts to crack.
> Mark
> NDSolve::ndinnt: Initial condition 0.0174533 x is not a number or a
>     rectangular array of numbers. >>
> ReplaceAll::reps: {<<1>>} is neither a list of replacement rules nor
>     a valid dispatch table, and so cannot be used for replacing. >>
> Set::shape: Lists {vf,\[Gamma]f,sf,hf} and {v,\[Gamma],s,h}<<2>>{v^
>     \[Prime][t]=={{-4.28284*10^13 Power[<<2>>] Sin[<<1>>]+0.000709677
>     <<2>> <<21>>[<<5>>][<<1>>],<<1>>-<<1>>},<<1>>},<<6>>,<<1>>} are
> not
>     the same shape. >>


  • Prev by Date: Re: Mouse movement speeds up and CityData Help Doesn't
  • Next by Date: Re: Compatibility woes
  • Previous by thread: Re: Re: Compatibility woes
  • Next by thread: Re: Compatibility woes