[Octave-bug-tracker] [bug #46230] Interval error: 'mpfr_function_d' undefined

[Doug Stewart]

URL:
  <http://savannah.gnu.org/bugs/?46230>

                 Summary: Interval error: 'mpfr_function_d' undefined
                 Project: GNU Octave
            Submitted by: dastew
            Submitted on: Fri 16 Oct 2015 21:47:18 GMT
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Regression
                  Status: None
             Assigned to: None
         Originator Name: Doug Stewart
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

This code was working and now gives an error.



% this is just a formula to start with
% have fun and change it if you want to.
f=@(x) x.^2 +3*x-1 + 5*x.*sin(x);

% the next 2 line take the Anonymous function into a symbolic formula
syms x;
ff=formula(f(x));
% now calculate the derivative of the function
ffd=diff(ff);
% and convert it back to an Anonymous function
df=function_handle(ffd)

fzero (f, infsup (-15, 10), df)


gives the following results


error: 'mpfr_function_d' undefined near line 56 column 5
error: called from
    mid at line 56 column 3
    fzero>findroots at line 139 column 7
    fzero at line 126 column 6
    ttt554 at line 14 column 1










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