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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14711 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp
2016-03-01 22:30:28 +00:00
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31
doc/fix_vector.txt
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@ -21,7 +21,8 @@ value = c_ID, c_ID\[N\], f_ID, f_ID\[N\], v_name :l
c_ID\[I\] = Ith component of global vector calculated by a compute with ID
f_ID = global scalar calculated by a fix with ID
f_ID\[I\] = Ith component of global vector calculated by a fix with ID
v_name = global value calculated by an equal-style variable with name :pre
v_name = value calculated by an equal-style variable with name
v_name\[I\] = Ith component of vector-style variable with name :pre
:ule
[Examples:]
@ -53,18 +54,18 @@ specified values may represent calculations performed by computes and
fixes which store their own "group" definitions.
Each listed value can be the result of a "compute"_compute.html or
"fix"_fix.html or the evaluation of an equal-style
"fix"_fix.html or the evaluation of an equal-style or vector-style
"variable"_variable.html. In each case, the compute, fix, or variable
must produce a global quantity, not a per-atom or local quantity.
And the global quantity must be a scalar, not a vector or array.
must produce a global quantity, not a per-atom or local quantity. And
the global quantity must be a scalar, not a vector or array.
"Computes"_compute.html that produce global quantities are those which
do not have the word {atom} in their style name. Only a few
"fixes"_fix.html produce global quantities. See the doc pages for
individual fixes for info on which ones produce such values.
"Variables"_variable.html of style {equal} are the only ones that can
be used with this fix. Variables of style {atom} cannot be used,
since they produce per-atom values.
"Variables"_variable.html of style {equal} or {vector} are the only
ones that can be used with this fix. Variables of style {atom} cannot
be used, since they produce per-atom values.
The {Nevery} argument specifies on what timesteps the input values
will be used in order to be stored. Only timesteps that are a
@ -107,13 +108,15 @@ Users can also write code for their own fix styles and "add them to
LAMMPS"_Section_modify.html.
If a value begins with "v_", a variable name must follow which has
been previously defined in the input script. Only equal-style
variables can be referenced. See the "variable"_variable.html command
for details. Note that variables of style {equal} 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 be stored by fix vector.
been previously defined in the input script. An equal-style or
vector-style variable can be referenced; the latter requires a
bracketed term to use the Ith element of the vector calculated by the
variable. See the "variable"_variable.html command for details. Note
that variables of style {equal} and {vector} 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
be stored by fix vector.
:line