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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@11209 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp 2014-01-09 18:29:02 +00:00
parent 106d58b165
commit 82897a55ab
2 changed files with 45 additions and 19 deletions
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33
doc/Section_commands.html
View File

@ -100,19 +100,27 @@ single leading "#" will comment out the entire command.
</P>
<P>(3) The line is searched repeatedly for $ characters, which indicate
variables that are replaced with a text string. See an exception in
(6).
(6).
</P>
<P>If the $ is followed by curly brackets, then the variable name is the
text inside the curly brackets. If no curly brackets follow the $,
then the variable name is the single character immediately following
the $. Thus ${myTemp} and $x refer to variable names "myTemp" and
"x".
"x".
</P>
<P>If the $ is followed by parenthesis, then the text inside the
parenthesis is treated as an "immediate" variable and evaluated as an
<A HREF = "variable.html">equal-style variable</A>. This is a way to use numeric
formulas in an input script without having to assign them to variable
names. For example, these 3 input script lines:
<P>How the variable is converted to a text string depends on what style
of variable it is; see the <A HREF = "variable">variable</A> doc page for details.
It can be a variable that stores multiple text strings, and return one
of them. The returned text string can be multiple "words" (space
separated) which will then be interpreted as multiple arguments in the
input command. The variable can also store a numeric formula which
will be evaluated and its numeric result returned as a string.
</P>
<P>As a special case, if the $ is followed by parenthesis, then the text
inside the parenthesis is treated as an "immediate" variable and
evaluated as an <A HREF = "variable.html">equal-style variable</A>. This is a way
to use numeric formulas in an input script without having to assign
them to variable names. For example, these 3 input script lines:
</P>
<PRE>variable X equal (xlo+xhi)/2+sqrt(v_area)
region 1 block $X 2 INF INF EDGE EDGE
@ -148,14 +156,19 @@ underscores, or punctuation characters.
line are arguments.
</P>
<P>(6) If you want text with spaces to be treated as a single argument,
it can be enclosed in either double or single quotes. E.g.
it can be enclosed in either double or single quotes. A long single
argument enclosed in quotes can even span multiple lines if the "&"
character is used, as described above. E.g.
</P>
<PRE>print "Volume = $v"
print 'Volume = $v'
print 'Volume = $v'
variable a string "red green blue &
purple orange cyan"
if "$<I>steps</I> > 1000" then quit
</PRE>
<P>The quotes are removed when the single argument is stored internally.
See the <A HREF = "dump_modify.html">dump modify format</A> or <A HREF = "print.html">print</A> or
</P>
<P>See the <A HREF = "dump_modify.html">dump modify format</A> or <A HREF = "print.html">print</A> or
<A HREF = "if.html">if</A> commands for examples. A "#" or "$" character that is
between quotes will not be treated as a comment indicator in (2) or
substituted for as a variable in (3).

31
doc/Section_commands.txt
View File

@ -96,19 +96,27 @@ single leading "#" will comment out the entire command.
(3) The line is searched repeatedly for $ characters, which indicate
variables that are replaced with a text string. See an exception in
(6).
(6).
If the $ is followed by curly brackets, then the variable name is the
text inside the curly brackets. If no curly brackets follow the $,
then the variable name is the single character immediately following
the $. Thus $\{myTemp\} and $x refer to variable names "myTemp" and
"x".
"x".
If the $ is followed by parenthesis, then the text inside the
parenthesis is treated as an "immediate" variable and evaluated as an
"equal-style variable"_variable.html. This is a way to use numeric
formulas in an input script without having to assign them to variable
names. For example, these 3 input script lines:
How the variable is converted to a text string depends on what style
of variable it is; see the "variable"_variable doc page for details.
It can be a variable that stores multiple text strings, and return one
of them. The returned text string can be multiple "words" (space
separated) which will then be interpreted as multiple arguments in the
input command. The variable can also store a numeric formula which
will be evaluated and its numeric result returned as a string.
As a special case, if the $ is followed by parenthesis, then the text
inside the parenthesis is treated as an "immediate" variable and
evaluated as an "equal-style variable"_variable.html. This is a way
to use numeric formulas in an input script without having to assign
them to variable names. For example, these 3 input script lines:
variable X equal (xlo+xhi)/2+sqrt(v_area)
region 1 block $X 2 INF INF EDGE EDGE
@ -144,13 +152,18 @@ underscores, or punctuation characters.
line are arguments.
(6) If you want text with spaces to be treated as a single argument,
it can be enclosed in either double or single quotes. E.g.
it can be enclosed in either double or single quotes. A long single
argument enclosed in quotes can even span multiple lines if the "&"
character is used, as described above. E.g.
print "Volume = $v"
print 'Volume = $v'
print 'Volume = $v'
variable a string "red green blue &
purple orange cyan"
if "${steps} > 1000" then quit :pre
The quotes are removed when the single argument is stored internally.
See the "dump modify format"_dump_modify.html or "print"_print.html or
"if"_if.html commands for examples. A "#" or "$" character that is
between quotes will not be treated as a comment indicator in (2) or