[Octave-bug-tracker] [bug #41035] splines: Bad matrix size for 'not-a-knot' condition and n==4

[Marco Guazzone]

URL:
  <http://savannah.gnu.org/bugs/?41035>

                 Summary: splines: Bad matrix size for 'not-a-knot' condition
and n==4
                 Project: GNU Octave
            Submitted by: sguazt
            Submitted on: Mon 30 Dec 2013 10:50:54 AM GMT
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.4
        Operating System: GNU/Linux

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Details:

Hello,

There is a bug in splines package (v. 1.2.6) for the case of 'not-a-knot'
spline and when the number of nodes (n) is equal to 4.

Test case:

x = [0 1 2 3]
y = [0 0.5 2 1.5]
csape(x,y,'not-a-knot')


This will generate the following error:

_error: horizontal dimensions mismatch (2x1 vs 1x2)_
_error: evaluating argument list element number 1_
_error: called from:_
_error: /home/sguazt/octave/splines-1.2.6/csape.m at line 207, column 20_

To fix this error, you can simply apply the attached patch.

Best,

-- Marco



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File Attachments:


-------------------------------------------------------
Date: Mon 30 Dec 2013 10:50:54 AM GMT  Name: csape.patch  Size: 407B   By:
sguazt
Patch generated with 'hg diff'
<http://savannah.gnu.org/bugs/download.php?file_id=30132>

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