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[Octave-bug-tracker] [bug #51624] griddata example fails

From: Steve Hageman
Subject: [Octave-bug-tracker] [bug #51624] griddata example fails
Date: Mon, 31 Jul 2017 00:15:13 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0


                 Summary: griddata example fails
                 Project: GNU Octave
            Submitted by: lostinspace
            Submitted on: Mon 31 Jul 2017 04:15:12 AM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: LostInSpace
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.0
        Operating System: Microsoft Windows



This example fails,

rand ("state", 1);
x = 2*rand (1000,1) - 1;
y = 2*rand (size (x)) - 1;
z = sin (2*(x.^2+y.^2));
[xx,yy] = meshgrid (linspace (-1,1,32));
zz = griddata (x, y, z, xx, yy);
mesh (xx, yy, zz);

The example is from help page at:

After running that example: 'yy' looks wrong it contains only -1,-1,-1,-1....

And 'zz' is definitely wrong it contains NaN's...

Command window shows no errors.

Windows 7 x64 / Octage 4.2.0 from the GNU Installer.


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