11.1.26 Changing the order of variables
The reorder
command rewrites an expression, based on the priority of variables.
-
reorder takes two arguments:
-
expr, an expression.
- vars, a vector of variable names.
- reorder(expr,vars) expands
expr according to the order of variables given in
vars.
Example
| reorder(x^2+2*x*a+a^2+z^2-x*z,[a,x,z]) |
Remark.
The variables must be symbolic before calling reorder.
If they are not, purge them (see Section 3.3.8).