bugGNU Octave - Bugs: bug #63379, Implement is* functions

 
 

bug #63379: Implement is* functions

Submitter:  Guillaume <gyom>
Submitted:  Thu 17 Nov 2022 04:38:52 PM UTC
 
Category:  Octave Function Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Feature Request
Status:  Confirmed Assigned to:  None
Originator Name:  Guillaume Open/Closed:  * Open
Release:  * dev Operating System:  * Any
Fixed Release:  None Planned Release:  None
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Fri 18 Nov 2022 08:06:07 PM UTC, comment #3: 

For clarity going forward, the list of isXXX functions to implement is

iscalendarduration
iscategorical
isdatetime
isduration
isenum
istable
istabular
istall
istimetable

A template for what these functions should look like is the function isstring.m.  The principal work will be to update the documentation for each function and to update the name of the class in the call to isa().

Rik <rik5>
Project Administrator
Fri 18 Nov 2022 05:31:10 PM UTC, comment #2: 

You are correct that iscodistributed, isdistributed, isgpuarray and isreplicated are from the Parallel Computing Toolbox so can be ignored for now. The other ones, including istall, seem to be in core Matlab. I'm nearly surprised that there isn't a isdictionary.

Guillaume <gyom>
Thu 17 Nov 2022 10:41:51 PM UTC, comment #1: 

I don't think there is an objection to adding functions that would be Matlab compatible, even if they did return false because these classes are not implemented in Octave yet.

I would, however, only include functions that are in core Matlab.  I didn't do an extensive check but "isgpuarray" and "isreplicated" don't seem to be in core Matlab.

Rik <rik5>
Project Administrator
Thu 17 Nov 2022 04:38:52 PM UTC, original submission:  

Having is<class> available for classes that are not yet implemented in Octave would be useful for compatibility with Matlab. This is, for example, already the case with isstring, even if, as commented in bug #50855, it would be better if the implementation was returning 'isa (s, "CLASS")' instead of 'false'. isStringScalar is also available in the same bug report.

Other functions that could be implemented in the same way are listed below:

iscalendarduration
iscategorical
iscodistributed
isdatetime
isdistributed
isduration
isenum
isgpuarray
isreplicated
istable
istabular
istall
istimetable

Would you consider their inclusion in Octave even if the corresponding class is not there yet?

Guillaume <gyom>

 

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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2022-11-17 rik5 StatusNone Confirmed

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