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<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_start.html">2. Getting Started</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_commands.html">3. Commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_packages.html">4. Packages</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_accelerate.html">5. Accelerating LAMMPS performance</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_howto.html">6. How-to discussions</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_example.html">7. Example problems</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_perf.html">8. Performance &amp; scalability</a></li>
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<li class="toctree-l1"><a class="reference internal" href="Section_modify.html">10. Modifying &amp; extending LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_python.html">11. Python interface to LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_errors.html">12. Errors</a></li>
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<li class="toctree-l1"><a class="reference internal" href="tutorials.html">Tutorials</a></li>
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<li class="toctree-l1"><a class="reference internal" href="fixes.html">Fixes</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="computes.html">Computes</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="compute_ackland_atom.html">compute ackland/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_angle.html">compute angle command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_angle_local.html">compute angle/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_angmom_chunk.html">compute angmom/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_basal_atom.html">compute basal/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_body_local.html">compute body/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_bond.html">compute bond command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_bond_local.html">compute bond/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_centro_atom.html">compute centro/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_chunk_atom.html">compute chunk/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cluster_atom.html">compute cluster/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_cna_atom.html">compute cna/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_com.html">compute com command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_com_chunk.html">compute com/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_contact_atom.html">compute contact/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_coord_atom.html">compute coord/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_damage_atom.html">compute damage/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dihedral.html">compute dihedral command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dihedral_local.html">compute dihedral/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dilatation_atom.html">compute dilatation/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dipole_chunk.html">compute dipole/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_displace_atom.html">compute displace/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dpd.html">compute dpd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_dpd_atom.html">compute dpd/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_asphere.html">compute erotate/asphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_rigid.html">compute erotate/rigid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_sphere.html">compute erotate/sphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_erotate_sphere_atom.html">compute erotate/sphere/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_event_displace.html">compute event/displace command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_fep.html">compute fep command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_group_group.html">compute group/group command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_gyration.html">compute gyration command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_gyration_chunk.html">compute gyration/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_heat_flux.html">compute heat/flux command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_hexorder_atom.html">compute hexorder/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_improper.html">compute improper command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_improper_local.html">compute improper/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_inertia_chunk.html">compute inertia/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke.html">compute ke command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_atom.html">compute ke/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_atom_eff.html">compute ke/atom/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_eff.html">compute ke/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ke_rigid.html">compute ke/rigid command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_meso_e_atom.html">compute meso/e/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_meso_rho_atom.html">compute meso/rho/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_meso_t_atom.html">compute meso/t/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_msd.html">compute msd command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_msd_chunk.html">compute msd/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_msd_nongauss.html">compute msd/nongauss command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_omega_chunk.html">compute omega/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_orientorder_atom.html">compute orientorder/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pair.html">compute pair command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pair_local.html">compute pair/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pe.html">compute pe command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pe_atom.html">compute pe/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_plasticity_atom.html">compute plasticity/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_pressure.html">compute pressure command</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">compute property/atom command</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#syntax">Syntax</a></li>
<li class="toctree-l3"><a class="reference internal" href="#examples">Examples</a></li>
<li class="toctree-l3"><a class="reference internal" href="#description">Description</a></li>
<li class="toctree-l3"><a class="reference internal" href="#restrictions">Restrictions</a></li>
<li class="toctree-l3"><a class="reference internal" href="#related-commands">Related commands</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="compute_property_chunk.html">compute property/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_property_local.html">compute property/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_rdf.html">compute rdf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_reduce.html">compute reduce command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_reduce.html#compute-reduce-region-command">compute reduce/region command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_rigid_local.html">compute rigid/local command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_saed.html">compute saed command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_slice.html">compute slice command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_contact_radius.html">compute smd/contact/radius command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_damage.html">compute smd/damage command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_hourglass_error.html">compute smd/hourglass/error command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_internal_energy.html">compute smd/internal/energy command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_plastic_strain.html">compute smd/plastic/strain command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_plastic_strain_rate.html">compute smd/plastic/strain/rate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_rho.html">compute smd/rho command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_defgrad.html">compute smd/tlsph/defgrad command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_dt.html">compute smd/tlsph/dt command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_num_neighs.html">compute smd/tlsph/num/neighs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_shape.html">compute smd/tlsph/shape command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_strain.html">compute smd/tlsph/strain command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_strain_rate.html">compute smd/tlsph/strain/rate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_tlsph_stress.html">compute smd/tlsph/stress command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_triangle_mesh_vertices.html">compute smd/triangle/mesh/vertices</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_num_neighs.html">compute smd/ulsph/num/neighs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_strain.html">compute smd/ulsph/strain command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_strain_rate.html">compute smd/ulsph/strain/rate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_ulsph_stress.html">compute smd/ulsph/stress command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_smd_vol.html">compute smd/vol command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html">compute sna/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-snad-atom-command">compute snad/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_sna_atom.html#compute-snav-atom-command">compute snav/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_stress_atom.html">compute stress/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html">compute force/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-heat-flux-tally-command">compute heat/flux/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-pe-tally-command">compute pe/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-pe-mol-tally-command">compute pe/mol/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_tally.html#compute-stress-tally-command">compute stress/tally command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp.html">compute temp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp.html#compute-temp-kk-command">compute temp/kk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_asphere.html">compute temp/asphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_body.html">compute temp/body command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_chunk.html">compute temp/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_com.html">compute temp/com command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_cs.html">compute temp/cs command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_deform.html">compute temp/deform command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_deform_eff.html">compute temp/deform/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_drude.html">compute temp/drude command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_eff.html">compute temp/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_partial.html">compute temp/partial command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_profile.html">compute temp/profile command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_ramp.html">compute temp/ramp command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_region.html">compute temp/region command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_region_eff.html">compute temp/region/eff command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_rotate.html">compute temp/rotate command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_temp_sphere.html">compute temp/sphere command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_ti.html">compute ti command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_torque_chunk.html">compute torque/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_vacf.html">compute vacf command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_vcm_chunk.html">compute vcm/chunk command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_voronoi_atom.html">compute voronoi/atom command</a></li>
<li class="toctree-l2"><a class="reference internal" href="compute_xrd.html">compute xrd command</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="pairs.html">Pair Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="bonds.html">Bonds</a></li>
<li class="toctree-l1"><a class="reference internal" href="angles.html">Angle Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="dihedrals.html">Dihedral Styles</a></li>
<li class="toctree-l1"><a class="reference internal" href="impropers.html">Improper Styles</a></li>
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<div class="section" id="compute-property-atom-command">
<span id="index-0"></span><h1>compute property/atom command</h1>
<div class="section" id="syntax">
<h2>Syntax</h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">compute</span> <span class="n">ID</span> <span class="n">group</span><span class="o">-</span><span class="n">ID</span> <span class="nb">property</span><span class="o">/</span><span class="n">atom</span> <span class="n">input1</span> <span class="n">input2</span> <span class="o">...</span>
</pre></div>
</div>
<ul>
<li><p class="first">ID, group-ID are documented in <a class="reference internal" href="compute.html"><span class="doc">compute</span></a> command</p>
</li>
<li><p class="first">property/atom = style name of this compute command</p>
</li>
<li><p class="first">input = one or more atom attributes</p>
<pre class="literal-block">
possible attributes = id, mol, proc, type, mass,
x, y, z, xs, ys, zs, xu, yu, zu, ix, iy, iz,
vx, vy, vz, fx, fy, fz,
q, mux, muy, muz, mu,
radius, diameter, omegax, omegay, omegaz,
angmomx, angmomy, angmomz,
shapex,shapey, shapez,
quatw, quati, quatj, quatk, tqx, tqy, tqz,
end1x, end1y, end1z, end2x, end2y, end2z,
corner1x, corner1y, corner1z,
corner2x, corner2y, corner2z,
corner3x, corner3y, corner3z,
nbonds,
vfrac, s0,
spin, eradius, ervel, erforce,
rho, drho, e, de, cv,
i_name, d_name
</pre>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="nb">id</span> <span class="o">=</span> <span class="n">atom</span> <span class="n">ID</span>
<span class="n">mol</span> <span class="o">=</span> <span class="n">molecule</span> <span class="n">ID</span>
<span class="n">proc</span> <span class="o">=</span> <span class="n">ID</span> <span class="n">of</span> <span class="n">processor</span> <span class="n">that</span> <span class="n">owns</span> <span class="n">atom</span>
<span class="nb">type</span> <span class="o">=</span> <span class="n">atom</span> <span class="nb">type</span>
<span class="n">mass</span> <span class="o">=</span> <span class="n">atom</span> <span class="n">mass</span>
<span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">,</span><span class="n">z</span> <span class="o">=</span> <span class="n">unscaled</span> <span class="n">atom</span> <span class="n">coordinates</span>
<span class="n">xs</span><span class="p">,</span><span class="n">ys</span><span class="p">,</span><span class="n">zs</span> <span class="o">=</span> <span class="n">scaled</span> <span class="n">atom</span> <span class="n">coordinates</span>
<span class="n">xu</span><span class="p">,</span><span class="n">yu</span><span class="p">,</span><span class="n">zu</span> <span class="o">=</span> <span class="n">unwrapped</span> <span class="n">atom</span> <span class="n">coordinates</span>
<span class="n">ix</span><span class="p">,</span><span class="n">iy</span><span class="p">,</span><span class="n">iz</span> <span class="o">=</span> <span class="n">box</span> <span class="n">image</span> <span class="n">that</span> <span class="n">the</span> <span class="n">atom</span> <span class="ow">is</span> <span class="ow">in</span>
<span class="n">vx</span><span class="p">,</span><span class="n">vy</span><span class="p">,</span><span class="n">vz</span> <span class="o">=</span> <span class="n">atom</span> <span class="n">velocities</span>
<span class="n">fx</span><span class="p">,</span><span class="n">fy</span><span class="p">,</span><span class="n">fz</span> <span class="o">=</span> <span class="n">forces</span> <span class="n">on</span> <span class="n">atoms</span>
<span class="n">q</span> <span class="o">=</span> <span class="n">atom</span> <span class="n">charge</span>
<span class="n">mux</span><span class="p">,</span><span class="n">muy</span><span class="p">,</span><span class="n">muz</span> <span class="o">=</span> <span class="n">orientation</span> <span class="n">of</span> <span class="n">dipole</span> <span class="n">moment</span> <span class="n">of</span> <span class="n">atom</span>
<span class="n">mu</span> <span class="o">=</span> <span class="n">magnitude</span> <span class="n">of</span> <span class="n">dipole</span> <span class="n">moment</span> <span class="n">of</span> <span class="n">atom</span>
<span class="n">radius</span><span class="p">,</span><span class="n">diameter</span> <span class="o">=</span> <span class="n">radius</span><span class="p">,</span><span class="n">diameter</span> <span class="n">of</span> <span class="n">spherical</span> <span class="n">particle</span>
<span class="n">omegax</span><span class="p">,</span><span class="n">omegay</span><span class="p">,</span><span class="n">omegaz</span> <span class="o">=</span> <span class="n">angular</span> <span class="n">velocity</span> <span class="n">of</span> <span class="n">spherical</span> <span class="n">particle</span>
<span class="n">angmomx</span><span class="p">,</span><span class="n">angmomy</span><span class="p">,</span><span class="n">angmomz</span> <span class="o">=</span> <span class="n">angular</span> <span class="n">momentum</span> <span class="n">of</span> <span class="n">aspherical</span> <span class="n">particle</span>
<span class="n">shapex</span><span class="p">,</span><span class="n">shapey</span><span class="p">,</span><span class="n">shapez</span> <span class="o">=</span> <span class="mi">3</span> <span class="n">diameters</span> <span class="n">of</span> <span class="n">aspherical</span> <span class="n">particle</span>
<span class="n">quatw</span><span class="p">,</span><span class="n">quati</span><span class="p">,</span><span class="n">quatj</span><span class="p">,</span><span class="n">quatk</span> <span class="o">=</span> <span class="n">quaternion</span> <span class="n">components</span> <span class="k">for</span> <span class="n">aspherical</span> <span class="ow">or</span> <span class="n">body</span> <span class="n">particles</span>
<span class="n">tqx</span><span class="p">,</span><span class="n">tqy</span><span class="p">,</span><span class="n">tqz</span> <span class="o">=</span> <span class="n">torque</span> <span class="n">on</span> <span class="n">finite</span><span class="o">-</span><span class="n">size</span> <span class="n">particles</span>
<span class="n">end12x</span><span class="p">,</span> <span class="n">end12y</span><span class="p">,</span> <span class="n">end12z</span> <span class="o">=</span> <span class="n">end</span> <span class="n">points</span> <span class="n">of</span> <span class="n">line</span> <span class="n">segment</span>
<span class="n">corner123x</span><span class="p">,</span> <span class="n">corner123y</span><span class="p">,</span> <span class="n">corner123z</span> <span class="o">=</span> <span class="n">corner</span> <span class="n">points</span> <span class="n">of</span> <span class="n">triangle</span>
<span class="n">nbonds</span> <span class="o">=</span> <span class="n">number</span> <span class="n">of</span> <span class="n">bonds</span> <span class="n">assigned</span> <span class="n">to</span> <span class="n">an</span> <span class="n">atom</span>
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span>PERI package per-atom properties:
vfrac = ???
s0 = ???
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">USER</span><span class="o">-</span><span class="n">EFF</span> <span class="ow">and</span> <span class="n">USER</span><span class="o">-</span><span class="n">AWPMD</span> <span class="n">package</span> <span class="n">per</span><span class="o">-</span><span class="n">atom</span> <span class="n">properties</span><span class="p">:</span>
<span class="n">spin</span> <span class="o">=</span> <span class="n">electron</span> <span class="n">spin</span>
<span class="n">eradius</span> <span class="o">=</span> <span class="n">electron</span> <span class="n">radius</span>
<span class="n">ervel</span> <span class="o">=</span> <span class="n">electron</span> <span class="n">radial</span> <span class="n">velocity</span>
<span class="n">erforce</span> <span class="o">=</span> <span class="n">electron</span> <span class="n">radial</span> <span class="n">force</span>
</pre></div>
</div>
<div class="highlight-default"><div class="highlight"><pre><span></span>USER-SPH package per-atom properties:
rho = ???
drho = ???
e = ???
de = ???
cv = ???
</pre></div>
</div>
<pre class="literal-block">
<a class="reference internal" href="fix_property_atom.html"><span class="doc">fix property/atom</span></a> per-atom properties:
i_name = custom integer vector with name
d_name = custom integer vector with name
</pre>
</li>
</ul>
</div>
<div class="section" id="examples">
<h2>Examples</h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">compute</span> <span class="mi">1</span> <span class="nb">all</span> <span class="nb">property</span><span class="o">/</span><span class="n">atom</span> <span class="n">xs</span> <span class="n">vx</span> <span class="n">fx</span> <span class="n">mux</span>
<span class="n">compute</span> <span class="mi">2</span> <span class="nb">all</span> <span class="nb">property</span><span class="o">/</span><span class="n">atom</span> <span class="nb">type</span>
<span class="n">compute</span> <span class="mi">1</span> <span class="nb">all</span> <span class="nb">property</span><span class="o">/</span><span class="n">atom</span> <span class="n">ix</span> <span class="n">iy</span> <span class="n">iz</span>
</pre></div>
</div>
</div>
<div class="section" id="description">
<h2>Description</h2>
<p>Define a computation that simply stores atom attributes for each atom
in the group. This is useful so that the values can be used by other
<a class="reference internal" href="Section_howto.html#howto-15"><span class="std std-ref">output commands</span></a> that take computes as
inputs. See for example, the <a class="reference internal" href="compute_reduce.html"><span class="doc">compute reduce</span></a>,
<a class="reference internal" href="fix_ave_atom.html"><span class="doc">fix ave/atom</span></a>, <a class="reference internal" href="fix_ave_histo.html"><span class="doc">fix ave/histo</span></a>,
<a class="reference internal" href="fix_ave_chunk.html"><span class="doc">fix ave/chunk</span></a>, and <a class="reference internal" href="variable.html"><span class="doc">atom-style variable</span></a> commands.</p>
<p>The list of possible attributes is the same as that used by the <a class="reference internal" href="dump.html"><span class="doc">dump custom</span></a> command, which describes their meaning, with some
additional quantities that are only defined for certain <a class="reference internal" href="atom_style.html"><span class="doc">atom styles</span></a>. Basically, this augmented list gives an
input script access to any per-atom quantity stored by LAMMPS.</p>
<p>The values are stored in a per-atom vector or array as discussed
below. Zeroes are stored for atoms not in the specified group or for
quantities that are not defined for a particular particle in the group
(e.g. <em>shapex</em> if the particle is not an ellipsoid).</p>
<p>The additional quantities only accessible via this command, and not
directly via the <a class="reference internal" href="dump.html"><span class="doc">dump custom</span></a> command, are as follows.</p>
<p><em>Shapex</em>, <em>shapey</em>, and <em>shapez</em> are defined for ellipsoidal particles
and define the 3d shape of each particle.</p>
<p><em>Quatw</em>, <em>quati</em>, <em>quatj</em>, and <em>quatk</em> are defined for ellipsoidal
particles and body particles and store the 4-vector quaternion
representing the orientation of each particle. See the <a class="reference internal" href="set.html"><span class="doc">set</span></a>
command for an explanation of the quaternion vector.</p>
<p><em>End1x</em>, <em>end1y</em>, <em>end1z</em>, <em>end2x</em>, <em>end2y</em>, <em>end2z</em>, are defined for
line segment particles and define the end points of each line segment.</p>
<p><em>Corner1x</em>, <em>corner1y</em>, <em>corner1z</em>, <em>corner2x</em>, <em>corner2y</em>,
<em>corner2z</em>, <em>corner3x</em>, <em>corner3y</em>, <em>corner3z</em>, are defined for
triangular particles and define the corner points of each triangle.</p>
<p><em>Nbonds</em> is available for all molecular atom styles and refers to the
number of explicit bonds assigned to an atom. Note that if the
<a class="reference internal" href="newton.html"><span class="doc">newton bond</span></a> command is set to <em>on</em>, which is the
default, then every bond in the system is assigned to only one of the
two atoms in the bond. Thus a bond between atoms I,J may be tallied
for either atom I or atom J. If <a class="reference internal" href="newton.html"><span class="doc">newton bond off</span></a> is set,
it will be tallied with both atom I and atom J.</p>
<p>The <em>i_name</em> and <em>d_name</em> attributes refer to custom integer and
floating-point properties that have been added to each atom via the
<a class="reference internal" href="fix_property_atom.html"><span class="doc">fix property/atom</span></a> command. When that command
is used specific names are given to each attribute which are what is
specified as the &#8220;name&#8221; portion of <em>i_name</em> or <em>d_name</em>.</p>
<p><strong>Output info:</strong></p>
<p>This compute calculates a per-atom vector or per-atom array depending
on the number of input values. If a single input is specified, a
per-atom vector is produced. If two or more inputs are specified, a
per-atom array is produced where the number of columns = the number of
inputs. The vector or array can be accessed by any command that uses
per-atom values from a compute as input. See <a class="reference internal" href="Section_howto.html#howto-15"><span class="std std-ref">this section</span></a> for an overview of LAMMPS output
options.</p>
<p>The vector or array values will be in whatever <a class="reference internal" href="units.html"><span class="doc">units</span></a> the
corresponding attribute is in, e.g. velocity units for vx, charge
units for q, etc.</p>
</div>
<div class="section" id="restrictions">
<h2>Restrictions</h2>
<blockquote>
<div>none</div></blockquote>
</div>
<div class="section" id="related-commands">
<h2>Related commands</h2>
<p><a class="reference internal" href="dump.html"><span class="doc">dump custom</span></a>, <a class="reference internal" href="compute_reduce.html"><span class="doc">compute reduce</span></a>, <a class="reference internal" href="fix_ave_atom.html"><span class="doc">fix ave/atom</span></a>, <a class="reference internal" href="fix_ave_chunk.html"><span class="doc">fix ave/chunk</span></a>,
<a class="reference internal" href="fix_property_atom.html"><span class="doc">fix property/atom</span></a></p>
<p><strong>Default:</strong> none</p>
</div>
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