<p>A section begins with a non-blank line whose 1st character is not a
“#”; blank lines or lines starting with “#” can be used as comments
between sections. The first line begins with a keyword which
identifies the section. The line can contain additional text, but the
initial text must match the argument specified in the fix command.</p>
<p>The next line lists the number of table entries and the species names
that correspond with all the species listed in the reaction equations
through the <em>fix rx</em> command.
The parameter “N” is required and its value is the number of table
entries that follow. Let Nfile = “N” in the tabulated file.
What LAMMPS does is a preliminary interpolation by creating splines
using the Nfile tabulated values as nodal points.</p>
<p>Following a blank line, the next N lines list the tabulated values.
On each line, the 1st value is the index from 1 to N, the 2nd value is
the internal temperature (in temperature units), the 3rd value until
the <em>m+3</em> value are the internal energies of the m species (in energy units).</p>
<p>Note that all internal temperature and internal energy values must
increase from one line to the next.</p>
<p>Note that one file can contain many sections, each with a tabulated
potential. LAMMPS reads the file section by section until it finds
one that matches the specified keyword.</p>
<hrclass="docutils"/>
<p>The format of a heat of formation file is as follows (without the
parenthesized comments):</p>
<divclass="highlight-default"><divclass="highlight"><pre><span></span><spanclass="c1"># HEAT OF FORMATION TABLE (one or more comment or blank lines)</span>
<p>Note that the species can be listed in any order. The tag that is
used as the species name must correspond with the tags used to define
the reactions with the <aclass="reference internal"href="fix_rx.html"><spanclass="doc">fix rx</span></a> command.</p>
</div>
<hrclass="docutils"/>
<divclass="section"id="restrictions">
<h2>Restrictions</h2>
<p>This command is part of the USER-DPD package. It is only enabled if
LAMMPS was built with that package. See the <aclass="reference internal"href="Section_start.html#start-3"><spanclass="std std-ref">Making LAMMPS</span></a> section for more info.</p>
<p>This command also requires use of the <aclass="reference internal"href="atom_style.html"><spanclass="doc">atom_style dpd</span></a>
command.</p>
<p>The equation of state must be a monotonically increasing function.</p>
<p>An error will occur if the internal temperature or internal energies
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