GNU Octave - Bugs: bug #62342, inf becomes nan

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bug #62342: inf becomes nan

Submitter:	None
Submitted:	Thu 21 Apr 2022 11:33:06 AM UTC


Category:	Interpreter	Severity:	3 - Normal
Priority:	5 - Normal	Item Group:	None
Status:	Duplicate	Assigned to:	None
Originator Name:		Originator Email:	-email is unavailable-
Open/Closed: *	Closed	Release: *	6.4.0
Operating System: *	Any	Fixed Release:	None
Planned Release:	None

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Thu 21 Apr 2022 12:49:10 PM UTC, comment #1:

This is a known issue and also happens with any other real number added to Inf*i. See bug #31974.

A possible workaround is to create the complex number like this:

>> complex(Inf, Inf)
ans = Inf + Infi

IIUC, the underlying issue is that `inf * i` is evaluated as:

>> Inf * complex(0, 1)
ans = NaN + Infi

The multiplication of Inf*0 for the real part results in NaN.

Closing as duplicate of the older bug.

Markus Mützel <mmuetzel>

Thu 21 Apr 2022 11:33:06 AM UTC, original submission:

>> inf+inf*i
ans = NaN + Infi

Anonymous

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Depends on the following items

Interpreter fails to create complex numbers with Inf complex parts (bug #31974, Wont Fix)

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Items that depend on this one: None found

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-email is unavailable- added by mmuetzel (Posted a comment)

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Date	Changed by	Updated Field	Previous Value	Replaced by
2022-04-21	mmuetzel	Category	None	Interpreter
		Status	None	Duplicate
		Open/Closed	Open	Closed
		Operating System	GNU/Linux	Any
		Dependencies	-	Depends on bugs #31974

GNU Octave - Bugs: bug #62342, inf becomes nan

bug #62342: inf becomes nan

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