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@ -143,13 +143,14 @@
c_ID[I] = Ith column of global array calculated by a compute with ID
f_ID = global vector calculated by a fix with ID
f_ID[I] = Ith column of global array calculated by a fix with ID
v_name = vector calculated by an vector-style variable with name
</pre></div>
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</div>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>compute 1 all slice 1 100 10 c_msdmol[4]
compute 1 all slice 301 400 1 c_msdmol[4]
compute 1 all slice 301 400 1 c_msdmol[4] v_myVec
</pre></div>
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@ -158,9 +159,9 @@ compute 1 all slice 301 400 1 c_msdmol[4]
<p>Define a calculation that &#8220;slices&#8221; one or more vector inputs into
smaller vectors, one per listed input. The inputs can be global
quantities; they cannot be per-atom or local quantities.
<a class="reference internal" href="compute.html"><em>Computes</em></a> and <a class="reference internal" href="fix.html"><em>fixes</em></a> may generate any of the
three kinds of quantities. <a class="reference internal" href="variable.html"><em>Variables</em></a> do not generate
global vectors. The group specified with this command is ignored.</p>
<a class="reference internal" href="compute.html"><em>Computes</em></a> and <a class="reference internal" href="fix.html"><em>fixes</em></a> and vector-style
<a class="reference internal" href="variable.html"><em>variables</em></a> can generate such global quantities. The
group specified with this command is ignored.</p>
<p>The values extracted from the input vector(s) are determined by the
<em>Nstart</em>, <em>Nstop</em>, and <em>Nskip</em> parameters. The elements of an input
vector of length N are indexed from 1 to N. Starting at element
@ -187,6 +188,14 @@ the values, else an error results. If no bracketed integer is
appended, the vector calculated by the fix is used. If a bracketed
integer is appended, the Ith column of the array calculated by the fix
is used. Users can also write code for their own fix style and <a class="reference internal" href="Section_modify.html"><em>add them to LAMMPS</em></a>.</p>
<p>If an input value begins with &#8220;<a href="#id5"><span class="problematic" id="id6">v_</span></a>&#8221;, a variable name must follow which
has been previously defined in the input script. Only vector-style
variables can be referenced. See the <a class="reference internal" href="variable.html"><em>variable</em></a> command
for details. Note that variables of style <em>vector</em> define a formula
which can reference individual atom properties or thermodynamic
keywords, or they can invoke other computes, fixes, or variables when
they are evaluated, so this is a very general means of specifying
quantities to slice.</p>
<p>If a single input is specified this compute produces a global vector,
even if the length of the vector is 1. If multiple inputs are
specified, then a global array of values is produced, with the number
@ -201,15 +210,16 @@ These values can be used by any command that uses global vector or
array values from a compute as input. See <a class="reference internal" href="Section_howto.html#howto-15"><span>this section</span></a> for an overview of LAMMPS output
options.</p>
<p>The vector or array values calculated by this compute are simply
copies of values generated by computes or fixes that are input vectors
to this compute. If there is a single input vector of intensive
and/or extensive values, then each value in the vector of values
calculated by this compute will be &#8220;intensive&#8221; or &#8220;extensive&#8221;,
copies of values generated by computes or fixes or variables that are
input vectors to this compute. If there is a single input vector of
intensive and/or extensive values, then each value in the vector of
values calculated by this compute will be &#8220;intensive&#8221; or &#8220;extensive&#8221;,
depending on the corresponding input value. If there are multiple
input vectors, and all the values in them are intensive, then the
array values calculated by this compute are &#8220;intensive&#8221;. If there are
multiple input vectors, and any value in them is extensive, then the
array values calculated by this compute are &#8220;extensive&#8221;.</p>
array values calculated by this compute are &#8220;extensive&#8221;. Values
produced by a variable are treated as intensive.</p>
<p>The vector or array values will be in whatever <a class="reference internal" href="units.html"><em>units</em></a> the
input quantities are in.</p>
</div>