git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@3139 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/fix_deform.html

@@ -180,14 +180,16 @@ is defined as delta/length0, where length0 is the original box length
 and delta is the change relative to the original length.  Thus if the
 <I>trate</I> R is 0.1 and time units are picoseconds, this means the box
 length will increase by 10% of its current length every picosecond.
-I.e. strain after 1 psec = 0.1, strain after 2 psec = 0.21, etc.
-R = 1 or 2 means the box length will double or triple every
-picosecond.  R = -0.01 means the box length will shrink by 1% of its
-current length every picosecond.  Note that for a "true" rate the
-change is continuous and based on the current length, so running with
-R = 1 for 10 picoseconds does not expand the box length by a factor of
-10 as it would with <I>erate</I>, but by a factor of 1024 since it doubles
-every picosecond.
+I.e. strain after 1 psec = 0.1, strain after 2 psec = 0.21, etc.  R =
+1 or 2 means the box length will double or triple every picosecond.  R
+= -0.01 means the box length will shrink by 1% of its current length
+every picosecond.  Note that for a "true" rate the change is
+continuous and based on the current length, so running with R = 1 for
+10 picoseconds does not expand the box length by a factor of 10 as it
+would with <I>erate</I>, but by a factor of 1024 since it doubles every
+picosecond.  Note that the <I>trate</I> value must be < -1.0 to be valid,
+since a value of -1.0 would mean shrink the box size or tilt by 100%
+to a value of 0.0.
 </P>
 <P>Note that to change the volume (or cross-sectional area) of the
 simulation box at a constant rate, you can change multiple dimensions

doc/fix_deform.txt

@@ -170,14 +170,16 @@ is defined as delta/length0, where length0 is the original box length
 and delta is the change relative to the original length.  Thus if the
 {trate} R is 0.1 and time units are picoseconds, this means the box
 length will increase by 10% of its current length every picosecond.
-I.e. strain after 1 psec = 0.1, strain after 2 psec = 0.21, etc.
-R = 1 or 2 means the box length will double or triple every
-picosecond.  R = -0.01 means the box length will shrink by 1% of its
-current length every picosecond.  Note that for a "true" rate the
-change is continuous and based on the current length, so running with
-R = 1 for 10 picoseconds does not expand the box length by a factor of
-10 as it would with {erate}, but by a factor of 1024 since it doubles
-every picosecond.
+I.e. strain after 1 psec = 0.1, strain after 2 psec = 0.21, etc.  R =
+1 or 2 means the box length will double or triple every picosecond.  R
+= -0.01 means the box length will shrink by 1% of its current length
+every picosecond.  Note that for a "true" rate the change is
+continuous and based on the current length, so running with R = 1 for
+10 picoseconds does not expand the box length by a factor of 10 as it
+would with {erate}, but by a factor of 1024 since it doubles every
+picosecond.  Note that the {trate} value must be < -1.0 to be valid,
+since a value of -1.0 would mean shrink the box size or tilt by 100%
+to a value of 0.0.
 
 Note that to change the volume (or cross-sectional area) of the
 simulation box at a constant rate, you can change multiple dimensions