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<div class="section" id="improper-style-zero-command">
<span id="index-0"></span><h1>improper_style zero command</h1>
<div class="section" id="syntax">
<h2>Syntax</h2>
<pre class="literal-block">
improper_style zero <em>nocoeff</em>
</pre>
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<div class="section" id="examples">
<h2>Examples</h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">improper_style</span> <span class="n">zero</span>
<span class="n">improper_style</span> <span class="n">zero</span> <span class="n">nocoeff</span>
<span class="n">improper_coeff</span> <span class="o">*</span>
</pre></div>
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</div>
<div class="section" id="description">
<h2>Description</h2>
<p>Using an improper style of zero means improper forces and energies are
not computed, but the geometry of improper quadruplets is still
accessible to other commands.</p>
<p>As an example, the <a class="reference internal" href="compute_improper_local.html"><span class="doc">compute improper/local</span></a> command can be used to
compute the chi values for the list of quadruplets of improper atoms
listed in the data file read by the <a class="reference internal" href="read_data.html"><span class="doc">read_data</span></a>
command. If no improper style is defined, this command cannot be
used.</p>
<p>The optional <em>nocoeff</em> flag allows to read data files with a ImproperCoeff
section for any improper style. Similarly, any improper_coeff commands
will only be checked for the improper type number and the rest ignored.</p>
<p>Note that the <a class="reference internal" href="improper_coeff.html"><span class="doc">improper_coeff</span></a> command must be
used for all improper types, though no additional values are
specified.</p>
</div>
<div class="section" id="restrictions">
<h2>Restrictions</h2>
<blockquote>
<div>none</div></blockquote>
<p><strong>Related commands:</strong> none</p>
<p><a class="reference internal" href="improper_none.html"><span class="doc">improper_style none</span></a></p>
<p><strong>Default:</strong> none</p>
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