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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@4043 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp 2010-04-23 20:18:34 +00:00
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24
doc/variable.html
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@ -29,7 +29,7 @@
numbers = 0.0, 100, -5.4, 2.8e-4, etc numbers = 0.0, 100, -5.4, 2.8e-4, etc
thermo keywords = vol, ke, press, etc from <A HREF = "thermo_style.html">thermo_style</A> thermo keywords = vol, ke, press, etc from <A HREF = "thermo_style.html">thermo_style</A>
math operators = (), -x, x+y, x-y, x*y, x/y, x^y, math operators = (), -x, x+y, x-y, x*y, x/y, x^y,
x==y, x!=y, x<y, x<=y, x>y, x>=y x==y, x!=y, x<y, x<=y, x>y, x>=y, x&&y, x||y
math functions = sqrt(x), exp(x), ln(x), log(x), math functions = sqrt(x), exp(x), ln(x), log(x),
sin(x), cos(x), tan(x), asin(x), acos(x), atan(x), sin(x), cos(x), tan(x), asin(x), acos(x), atan(x),
ceil(x), floor(x), round(x) ceil(x), floor(x), round(x)
@ -247,7 +247,7 @@ references to other variables.
<DIV ALIGN=center><TABLE BORDER=1 > <DIV ALIGN=center><TABLE BORDER=1 >
<TR><TD >Number</TD><TD > 0.2, 100, 1.0e20, -15.4, etc</TD></TR> <TR><TD >Number</TD><TD > 0.2, 100, 1.0e20, -15.4, etc</TD></TR>
<TR><TD >Thermo keywords</TD><TD > vol, pe, ebond, etc</TD></TR> <TR><TD >Thermo keywords</TD><TD > vol, pe, ebond, etc</TD></TR>
<TR><TD >Math operators</TD><TD > (), -x, x+y, x-y, x*y, x/y, x^y, x==y, x!=y, x<y, x<=y, x>y, x>=y</TD></TR> <TR><TD >Math operators</TD><TD > (), -x, x+y, x-y, x*y, x/y, x^y, x==y, x!=y, x<y, x<=y, x>y, x>=y, x&&y, x||y</TD></TR>
<TR><TD >Math functions</TD><TD > sqrt(x), exp(x), ln(x), log(x), sin(x), cos(x), tan(x), asin(x), acos(x), atan(x), ceil(x), floor(x), round(x)</TD></TR> <TR><TD >Math functions</TD><TD > sqrt(x), exp(x), ln(x), log(x), sin(x), cos(x), tan(x), asin(x), acos(x), atan(x), ceil(x), floor(x), round(x)</TD></TR>
<TR><TD >Group functions</TD><TD > count(ID), mass(ID), charge(ID), xcm(ID,dim), vcm(ID,dim), fcm(ID,dim), bound(ID,dir), gyration(ID), ke(ID)</TD></TR> <TR><TD >Group functions</TD><TD > count(ID), mass(ID), charge(ID), xcm(ID,dim), vcm(ID,dim), fcm(ID,dim), bound(ID,dir), gyration(ID), ke(ID)</TD></TR>
<TR><TD >Region functions</TD><TD > count(ID,IDR), mass(ID,IDR), charge(ID,IDR), xcm(ID,dim,IDR), vcm(ID,dim,IDR), fcm(ID,dim,IDR), bound(ID,dir,IDR), gyration(ID,IDR), ke(ID,IDR)</TD></TR> <TR><TD >Region functions</TD><TD > count(ID,IDR), mass(ID,IDR), charge(ID,IDR), xcm(ID,dim,IDR), vcm(ID,dim,IDR), fcm(ID,dim,IDR), bound(ID,dir,IDR), gyration(ID,IDR), ke(ID,IDR)</TD></TR>
@ -289,20 +289,26 @@ are evaluated left to right and have the usual C-style precedence:
unary minus before exponentiation ("^"); exponentiation before unary minus before exponentiation ("^"); exponentiation before
multiplication and division; multiplication and division before multiplication and division; multiplication and division before
addition and subtraction; addition and subtraction before the 4 addition and subtraction; addition and subtraction before the 4
relational operators "<", "<=", ">", and ">="; and those 4 relational relational operators "<", "<=", ">", and ">="; those 4 relational
operators before the remaining two relational operators "==" and "!=". operators before the remaining two relational operators "==" and "!=";
those two relational operators before the logical AND operator "&&";
and the AND operator "&&" before the logical OR operator "||".
Parenthesis can be used to group one or more portions of a formula and Parenthesis can be used to group one or more portions of a formula and
enforce a different order of evaluation than that invoked by the the enforce a different order of evaluation than what would occur with the
default precedence. default precedence.
</P> </P>
<P>The 6 relational operators return either a 1.0 or 0.0 depending on <P>The 6 relational operators return either a 1.0 or 0.0 depending on
whether the relationship between x and y is true or false. For whether the relationship between x and y is true or false. For
example the expression x<10.0 in an atom-style variable formula will example the expression x<10.0 in an atom-style variable formula will
return 1.0 for all atoms whose x-coordinate is less than 10.0, and 0.0 return 1.0 for all atoms whose x-coordinate is less than 10.0, and 0.0
for the others. This can be used as a masking or selection operation for the others. The logical AND operator will return 1.0 of both its
in a formula. For example, the number of such atoms could be arguments are non-zero, else return a 0.0. The logical OR operator
calculated by taking the returned per-atom vector of ones and zeroes will return 1.0 of either of its arguments is non-zero, else return a
and passing it to the <A HREF = "compute_reduce.html">compute reduce</A> command. 0.0. These relational and logical operators can be used as a masking
or selection operation in a formula. For example, the number of atoms
whose properties satisy one or more criteria could be calculated by
taking the returned per-atom vector of ones and zeroes and passing it
to the <A HREF = "compute_reduce.html">compute reduce</A> command.
</P> </P>
<P>Math functions can be specified as keywords followed by a <P>Math functions can be specified as keywords followed by a
parenthesized argument, e.g. sqrt(v_ke). Note that ln() is the parenthesized argument, e.g. sqrt(v_ke). Note that ln() is the

24
doc/variable.txt
View File

@ -24,7 +24,7 @@ style = {delete} or {index} or {loop} or {world} or {universe} or {uloop} or {eq
numbers = 0.0, 100, -5.4, 2.8e-4, etc numbers = 0.0, 100, -5.4, 2.8e-4, etc
thermo keywords = vol, ke, press, etc from "thermo_style"_thermo_style.html thermo keywords = vol, ke, press, etc from "thermo_style"_thermo_style.html
math operators = (), -x, x+y, x-y, x*y, x/y, x^y, math operators = (), -x, x+y, x-y, x*y, x/y, x^y,
x==y, x!=y, x<y, x<=y, x>y, x>=y x==y, x!=y, x<y, x<=y, x>y, x>=y, x&&y, x||y
math functions = sqrt(x), exp(x), ln(x), log(x), math functions = sqrt(x), exp(x), ln(x), log(x),
sin(x), cos(x), tan(x), asin(x), acos(x), atan(x), sin(x), cos(x), tan(x), asin(x), acos(x), atan(x),
ceil(x), floor(x), round(x) ceil(x), floor(x), round(x)
@ -240,7 +240,7 @@ references to other variables.
Number: 0.2, 100, 1.0e20, -15.4, etc Number: 0.2, 100, 1.0e20, -15.4, etc
Thermo keywords: vol, pe, ebond, etc Thermo keywords: vol, pe, ebond, etc
Math operators: (), -x, x+y, x-y, x*y, x/y, x^y, x==y, x!=y, x<y, x<=y, x>y, x>=y Math operators: (), -x, x+y, x-y, x*y, x/y, x^y, x==y, x!=y, x<y, x<=y, x>y, x>=y, x&&y, x||y
Math functions: sqrt(x), exp(x), ln(x), log(x), sin(x), cos(x), tan(x), asin(x), acos(x), atan(x), ceil(x), floor(x), round(x) Math functions: sqrt(x), exp(x), ln(x), log(x), sin(x), cos(x), tan(x), asin(x), acos(x), atan(x), ceil(x), floor(x), round(x)
Group functions: count(ID), mass(ID), charge(ID), xcm(ID,dim), \ Group functions: count(ID), mass(ID), charge(ID), xcm(ID,dim), \
vcm(ID,dim), fcm(ID,dim), bound(ID,dir), gyration(ID), ke(ID) vcm(ID,dim), fcm(ID,dim), bound(ID,dir), gyration(ID), ke(ID)
@ -284,20 +284,26 @@ are evaluated left to right and have the usual C-style precedence:
unary minus before exponentiation ("^"); exponentiation before unary minus before exponentiation ("^"); exponentiation before
multiplication and division; multiplication and division before multiplication and division; multiplication and division before
addition and subtraction; addition and subtraction before the 4 addition and subtraction; addition and subtraction before the 4
relational operators "<", "<=", ">", and ">="; and those 4 relational relational operators "<", "<=", ">", and ">="; those 4 relational
operators before the remaining two relational operators "==" and "!=". operators before the remaining two relational operators "==" and "!=";
those two relational operators before the logical AND operator "&&";
and the AND operator "&&" before the logical OR operator "||".
Parenthesis can be used to group one or more portions of a formula and Parenthesis can be used to group one or more portions of a formula and
enforce a different order of evaluation than that invoked by the the enforce a different order of evaluation than what would occur with the
default precedence. default precedence.
The 6 relational operators return either a 1.0 or 0.0 depending on The 6 relational operators return either a 1.0 or 0.0 depending on
whether the relationship between x and y is true or false. For whether the relationship between x and y is true or false. For
example the expression x<10.0 in an atom-style variable formula will example the expression x<10.0 in an atom-style variable formula will
return 1.0 for all atoms whose x-coordinate is less than 10.0, and 0.0 return 1.0 for all atoms whose x-coordinate is less than 10.0, and 0.0
for the others. This can be used as a masking or selection operation for the others. The logical AND operator will return 1.0 of both its
in a formula. For example, the number of such atoms could be arguments are non-zero, else return a 0.0. The logical OR operator
calculated by taking the returned per-atom vector of ones and zeroes will return 1.0 of either of its arguments is non-zero, else return a
and passing it to the "compute reduce"_compute_reduce.html command. 0.0. These relational and logical operators can be used as a masking
or selection operation in a formula. For example, the number of atoms
whose properties satisy one or more criteria could be calculated by
taking the returned per-atom vector of ones and zeroes and passing it
to the "compute reduce"_compute_reduce.html command.
Math functions can be specified as keywords followed by a Math functions can be specified as keywords followed by a
parenthesized argument, e.g. sqrt(v_ke). Note that ln() is the parenthesized argument, e.g. sqrt(v_ke). Note that ln() is the