/**
* Differentiates an expression tree wrt a variable var.
*
* @param node the top node of the expression tree
* @param var the variable to differentiate wrt
* @return the top node of the differentiated expression
* @throws ParseException if some error occurred while trying to differentiate, for instance of no
* rule supplied for given function.
* @throws IllegalArgumentException
*/
public Node differentiate(Node node, String var, DJep djep)
throws ParseException, IllegalArgumentException {
this.localDJep = djep;
this.nf = djep.getNodeFactory();
this.tu = djep.getTreeUtils();
// this.opSet=djep.getOperatorSet();
if (node == null) throw new IllegalArgumentException("node parameter is null");
if (var == null) throw new IllegalArgumentException("var parameter is null");
Node res = (Node) node.jjtAccept(this, var);
return res;
}
public Object eval(Node node) throws ParseException {
MatrixValueI val = (MatrixValueI) node.jjtAccept(this, null);
return val.copy();
}