git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@8178 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/fix_temp_berendsen.html

@@ -17,9 +17,14 @@
 </P>
 <PRE>fix ID group-ID temp/berendsen Tstart Tstop Tdamp 
 </PRE>
-<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
-<LI>temp/berendsen = style name of this fix command
-<LI>Tstart,Tstop = desired temperature at start/end of run
+<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command 
+
+<LI>temp/berendsen = style name of this fix command 
+
+<LI>Tstart,Tstop = desired temperature at start/end of run 
+
+<PRE>  Tstart can be a variable (see below) 
+</PRE>
 <LI>Tdamp = temperature damping parameter (time units) 
 </UL>
 <P><B>Examples:</B>
@@ -46,6 +51,17 @@ example, a value of 100.0 means to relax the temperature in a timespan
 of (roughly) 100 time units (tau or fmsec or psec - see the
 <A HREF = "units.html">units</A> command).
 </P>
+<P><I>Tstart</I> can be specified as an equal-style <A HREF = "variable.html">variable</A>.
+In this case, the <I>Tstop</I> setting is ignored.  If the value is a
+variable, it should be specified as v_name, where name is the variable
+name.  In this case, the variable will be evaluated each timestep, and
+its value used to determine the target temperature.
+</P>
+<P>Equal-style variables can specify formulas with various mathematical
+functions, and include <A HREF = "thermo_style.html">thermo_style</A> command
+keywords for the simulation box parameters and timestep and elapsed
+time.  Thus it is easy to specify a time-dependent temperature.
+</P>
 <P>IMPORTANT NOTE: Unlike the <A HREF = "fix_nh.html">fix nvt</A> command which
 performs Nose/Hoover thermostatting AND time integration, this fix
 does NOT perform time integration.  It only modifies velocities to

doc/fix_temp_berendsen.txt

@@ -13,10 +13,11 @@ fix temp/berendsen/cuda command :h3
 
 fix ID group-ID temp/berendsen Tstart Tstop Tdamp :pre
 
-ID, group-ID are documented in "fix"_fix.html command
-temp/berendsen = style name of this fix command
-Tstart,Tstop = desired temperature at start/end of run
-Tdamp = temperature damping parameter (time units) :ul
+ID, group-ID are documented in "fix"_fix.html command :ulb,l
+temp/berendsen = style name of this fix command :l
+Tstart,Tstop = desired temperature at start/end of run :l
+  Tstart can be a variable (see below) :pre
+Tdamp = temperature damping parameter (time units) :l,ule
 
 [Examples:]
 
@@ -42,6 +43,17 @@ example, a value of 100.0 means to relax the temperature in a timespan
 of (roughly) 100 time units (tau or fmsec or psec - see the
 "units"_units.html command).
 
+{Tstart} can be specified as an equal-style "variable"_variable.html.
+In this case, the {Tstop} setting is ignored.  If the value is a
+variable, it should be specified as v_name, where name is the variable
+name.  In this case, the variable will be evaluated each timestep, and
+its value used to determine the target temperature.
+
+Equal-style variables can specify formulas with various mathematical
+functions, and include "thermo_style"_thermo_style.html command
+keywords for the simulation box parameters and timestep and elapsed
+time.  Thus it is easy to specify a time-dependent temperature.
+
 IMPORTANT NOTE: Unlike the "fix nvt"_fix_nh.html command which
 performs Nose/Hoover thermostatting AND time integration, this fix
 does NOT perform time integration.  It only modifies velocities to

doc/fix_temp_rescale.html

@@ -19,11 +19,18 @@
 </P>
 <PRE>fix ID group-ID temp/rescale N Tstart Tstop window fraction 
 </PRE>
-<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
-<LI>temp/rescale = style name of this fix command
-<LI>N = perform rescaling every N steps 
-<LI>Tstart,Tstop = desired temperature at start/end of run (temperature units)
-<LI>window = only rescale if temperature is outside this window (temperature units)
+<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command 
+
+<LI>temp/rescale = style name of this fix command 
+
+<LI>N = perform rescaling every N steps  
+
+<LI>Tstart,Tstop = desired temperature at start/end of run (temperature units) 
+
+<PRE>  Tstart can be a variable (see below) 
+</PRE>
+<LI>window = only rescale if temperature is outside this window (temperature units) 
+
 <LI>fraction = rescale to target temperature by this fraction 
 </UL>
 <P><B>Examples:</B>
@@ -48,6 +55,17 @@ before thermostatting takes place; see the description below.
 ramped value between the <I>Tstart</I> and <I>Tstop</I> temperatures at the
 beginning and end of the run.
 </P>
+<P><I>Tstart</I> can be specified as an equal-style <A HREF = "variable.html">variable</A>.
+In this case, the <I>Tstop</I> setting is ignored.  If the value is a
+variable, it should be specified as v_name, where name is the variable
+name.  In this case, the variable will be evaluated each timestep, and
+its value used to determine the target temperature.
+</P>
+<P>Equal-style variables can specify formulas with various mathematical
+functions, and include <A HREF = "thermo_style.html">thermo_style</A> command
+keywords for the simulation box parameters and timestep and elapsed
+time.  Thus it is easy to specify a time-dependent temperature.
+</P>
 <P>Rescaling is only performed if the difference between the current and
 desired temperatures is greater than the <I>window</I> value.  The amount
 of rescaling that is applied is a <I>fraction</I> (from 0.0 to 1.0) of the

doc/fix_temp_rescale.txt

@@ -14,12 +14,13 @@ fix temp/rescale/limit/cuda command :h3
 
 fix ID group-ID temp/rescale N Tstart Tstop window fraction :pre
 
-ID, group-ID are documented in "fix"_fix.html command
-temp/rescale = style name of this fix command
-N = perform rescaling every N steps 
-Tstart,Tstop = desired temperature at start/end of run (temperature units)
-window = only rescale if temperature is outside this window (temperature units)
-fraction = rescale to target temperature by this fraction :ul
+ID, group-ID are documented in "fix"_fix.html command :ulb,l
+temp/rescale = style name of this fix command :l
+N = perform rescaling every N steps  :l
+Tstart,Tstop = desired temperature at start/end of run (temperature units) :l
+  Tstart can be a variable (see below) :pre
+window = only rescale if temperature is outside this window (temperature units) :l
+fraction = rescale to target temperature by this fraction :l,ule
 
 [Examples:]
 
@@ -43,6 +44,17 @@ Rescaling is performed every N timesteps.  The target temperature is a
 ramped value between the {Tstart} and {Tstop} temperatures at the
 beginning and end of the run.
 
+{Tstart} can be specified as an equal-style "variable"_variable.html.
+In this case, the {Tstop} setting is ignored.  If the value is a
+variable, it should be specified as v_name, where name is the variable
+name.  In this case, the variable will be evaluated each timestep, and
+its value used to determine the target temperature.
+
+Equal-style variables can specify formulas with various mathematical
+functions, and include "thermo_style"_thermo_style.html command
+keywords for the simulation box parameters and timestep and elapsed
+time.  Thus it is easy to specify a time-dependent temperature.
+
 Rescaling is only performed if the difference between the current and
 desired temperatures is greater than the {window} value.  The amount
 of rescaling that is applied is a {fraction} (from 0.0 to 1.0) of the