[Octave-bug-tracker] [bug #49919] ode45 event problem, event active at initial time

[Rik]

Update of bug #49919 (project octave):

                  Status:                    None => Need Info              

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Follow-up Comment #1:

@Bill: Can you send a pointer to the location in the Matlab docs where this is
explained?  I don't think it was clear what we were aiming for.

Also, I think bug #49846 (wrong initial time for Event function) bears on
this.  If I run your test script with Octave-4.2.0 I get


event_first_step
ie =  1
tfinal =  6.2832
yfinal =

   1.0000e+00   2.7756e-17  -1.1102e-16   3.0000e-01


If I run the stable branch code after 


changeset:   22894:544dac72d414
branch:      stable
parent:      22891:fd056e736f73
user:        Rik <address@hidden>
date:        Thu Dec 15 15:23:43 2016 -0800
summary:     Initialize ODE Event function with start time (bug #49846).


I get


octave:1> event_first_step
ie =  1
tfinal = 0
yfinal =

   1.0000e+00   2.7756e-17  -1.1102e-16   3.0000e-01


The variable tfinal looks correct because the last integration time was 0. 
I'm tempted to close #49846.



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