bugGNU Octave - Bugs: bug #60680, arrayfun should support...


bug #60680: arrayfun should support user-defined class arrays that support linear indexing

Submitter:  Mike Miller <mtmiller>
Submitted:  Thu 27 May 2021 10:17:53 PM UTC
Category:  Octave Function Severity:  1 - Wish
Priority:  5 - Normal Item Group:  Feature Request
Status:  None Assigned to:  None
Originator Name:  Open/Closed:  * Open
Release:  * dev Operating System:  * GNU/Linux
Fixed Release:  None Planned Release:  None
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Thu 27 May 2021 10:17:53 PM UTC, original submission:  

The built-in arrayfun function should support user-defined classes that can implement arrays of objects.

An example is the @sym class in the symbolic package:

>> A = sym([1, 2, 3]);
>> numel (A)
ans = 3
>> size (A)
ans =

   1   3

>> A(1)
ans = (sym) 1
>> A(end)
ans = (sym) 3
>> arrayfun (@(x) pi, A)
ans = 3.1416

The last shows that arrayfun only returns 1 value, so it treats the @sym object as a single scalar. It should return a 1×3 vector:

>> arrayfun (@(x) pi, double (A))
ans =

   3.1416   3.1416   3.1416

Mike Miller <mtmiller>
Group Member


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    Date Changed by Updated Field Previous Value => Replaced by
    2021-12-27 tutissanalio Carbon-Copy- Added tutissanalio
    2021-05-27 mtmiller Carbon-CopyRemoved 80942 -

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