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<html>
<head>
<title>
FD1D_DISPLAY - Display 1D Finite Difference Data
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
FD1D_DISPLAY <br> Display 1D Finite Difference Data
</h1>
<hr>
<p>
<b>FD1D_DISPLAY</b>
is a MATLAB program which
reads a prefix defining a pair of files containing the nodes
and values for finite difference data, and displays
a plot.
</p>
<p>
The program is designed for cases in which the independent variable
data ranges over a single dimension, either of space, or of time.
</p>
<p>
Thus, it can be used to display results from a steady-state
model of heat, a 1D time-independent boundary value problem,
or the time variation of a predator-prey system in which there
is no spatial variation.
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
<b>fd1d_display</b> ( <i>'prefix'</i> )
</blockquote>
where <i>'prefix'</i> is the common filename prefix of:
<ul>
<li>
<i>'prefix'</i><b>_nodes.txt</b>, containing the node coordinates;
</li>
<li>
<i>'prefix'</i><b>_values.txt</b>, containing one or more values
at each node;
</li>
</ul>
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>FD1D_DISPLAY</b> is available in
<a href = "../../m_src/fd1d_display/fd1d_display.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/fd_predator_prey/fd_predator_prey.html">
FD_PREDATOR_PREY</a>,
a MATLAB program which
applies a finite difference approach to a predator-prey system
with time dependence and no spatial variation.
</p>
<p>
<a href = "../../data/fd1d/fd1d.html">
FD1D</a>,
a data directory of examples of 1D FD files,
a set of two text files that can be used to describe
many 1D finite difference models;
</p>
<p>
<a href = "../../m_src/fd1d_bvp/fd1d_bvp.html">
FD1D_BVP</a>,
a MATLAB program which
applies the finite difference method
to a two point boundary value problem in one spatial dimension.
</p>
<p>
<a href = "../../m_src/fd1d_heat_steady/fd1d_heat_steady.html">
FD1D_HEAT_STEADY</a>,
a MATLAB program which
uses the finite difference method to solve the steady (time independent)
heat equation in 1D.
</p>
<p>
<a href = "../../m_src/fd1d_wave/fd1d_wave.html">
FD1D_WAVE</a>,
a MATLAB program which
applies the finite difference method to solve the time-dependent
wave equation in one spatial dimension.
</p>
<p>
<a href = "../../m_src/fem1d_display/fem1d_display.html">
FEM1D_DISPLAY</a>,
a MATLAB program which
reads a trio of files defining a 1D finite element model, and plots the data.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "fd1d_display.m">fd1d_display.m</a>,
the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<b>ARCTAN</b> contains sample data from the arctangent function
at 29 non-uniformly spaced nodes.
<ul>
<li>
<a href = "arctan_nodes.txt">arctan_nodes.txt</a>
</li>
<li>
<a href = "arctan_values.txt">arctan_values.txt</a>
</li>
<li>
<a href = "arctan.png">arctan.png</a>,
a PNG snapshot of the plot.
</li>
</ul>
</p>
<p>
<b>PAIR</b> shows how a plot is made when there are two columns of
data in the "values" file. The first column is a copy of the
original ARCTAN data, and the second column is some perturbed values.
<ul>
<li>
<a href = "pair_nodes.txt">pair_nodes.txt</a>
</li>
<li>
<a href = "pair_values.txt">pair_values.txt</a>
</li>
<li>
<a href = "pair.png">pair.png</a>,
a PNG snapshot of the plot.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 28 January 2010.
</i>
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