Re: Interpolating matrix

• To: mathgroup at smc.vnet.net
• Subject: [mg45529] Re: Interpolating matrix
• From: Paul Abbott <paul at physics.uwa.edu.au>
• Date: Mon, 12 Jan 2004 02:15:39 -0500 (EST)
• Organization: The University of Western Australia
• References: <btndag\$37\$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

```In article <btndag\$37\$1 at smc.vnet.net>,
Zsolt Regaly <rezso at general.elte.hu> wrote:

> Hi
>
> Could anybody help me to find out how can I interpolate a matrix?
>
> Let'us have a 10x10 matrix and I'd like to make a DensityPlot by
> resolution of 100x100 for example.

Use Interpolation. Here is some (indexed) data:

Table[{x, y, Cos[x y]}, {x, 0, 1, 0.2}, {y, 0, 1, 0.2}]

Interpolate (after converting to a one-dimensional data list),

cosint=Interpolation[Flatten[%, 1]]

and then plot:

DensityPlot[cosint[x,y],{x,0,1},{y,0,1},PlotPoints->100, Mesh-> False];

Cheers,
Paul

--
Paul Abbott                                   Phone: +61 8 9380 2734
School of Physics, M013                         Fax: +61 8 9380 1014
The University of Western Australia      (CRICOS Provider No 00126G)
35 Stirling Highway
Crawley WA 6009                      mailto:paul at physics.uwa.edu.au
AUSTRALIA                            http://physics.uwa.edu.au/~paul

```

• Prev by Date: Re: Wishart Distribution
• Next by Date: Re: Convert automatic objects to literal
• Previous by thread: Interpolating matrix
• Next by thread: finding eigenvalues