[Octave-bug-tracker] [bug #32591] matrix type confusion in cellfun

[Thorsten Meyer]

URL:
  <http://savannah.gnu.org/bugs/?32591>

                 Summary: matrix type confusion in cellfun
                 Project: GNU Octave
            Submitted by: tmeyier
            Submitted on: Thu 24 Feb 2011 08:36:01 PM UTC
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Thorsten Meyer
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

Hi,

I found the following bug in cellfun:

y=[1,2,3;4,5,6;7,8,9];
cellfun(@(x) y(x,1), {1,2,3}, "uniformoutput", false)

gives the error message:
"error: can't perform indexing operations for matrix type"

Strangely, these two lines work nicely:

cellfun(@(x) y(x(1),1), {1,2,3}, "uniformoutput", false)
cellfun(@(x) y(x*1,1), {1,2,3}, "uniformoutput", false)


Also, these two lines give the same result (3 cell rows of "scalar"):

cellfun(@(x) typeinfo(x), {1,2,3}, "uniformoutput", false)
cellfun(@(x) typeinfo(1*x), {1,2,3}, "uniformoutput", false)


The bug must have been introduced sometime between july 2010 and october 2010
(based on old development builds I still happen to have around).

regards

Thorsten






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