GNU Octave - Bugs: bug #57141, fzero should warn when objective...

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bug #57141: fzero should warn when objective function produces complex value on interval endpoints

Submitter:	Rik <rik5>
Submitted:	Tue 29 Oct 2019 09:50:23 PM UTC


Category:	Octave Function	Severity:	3 - Normal
Priority:	5 - Normal	Item Group:	Other
Status:	Confirmed	Assigned to:	None
Originator Name:		Open/Closed: *	Open
Release: *	dev	Operating System: *	Any
Fixed Release:	None	Planned Release:	None

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Tue 29 Oct 2019 09:50:23 PM UTC, original submission:

Code to reproduce in Octave:

fzero (@(x) 0.5*x + 2*i*x - 5, [-20, 100])
error: fzero: not a valid initial bracketing
error: called from
fzero at line 223 column 5

However, in Matlab, this example throws a warning that the function must be finite and real at the endpoints. This is a more relevant message.

Rik <rik5>

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Date	Changed by	Updated Field	Previous Value	=>	Replaced by
2019-10-29	rik5	Summary	fzero should warn when objective function produces complex value		fzero should warn when objective function produces complex value on interval endpoints

GNU Octave - Bugs: bug #57141, fzero should warn when objective...

bug #57141: fzero should warn when objective function produces complex value on interval endpoints

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