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java.lang.Objectorg.lsmp.djep.djep.diffRules.ChainRuleDiffRules
public abstract class ChainRuleDiffRules
Common methods used when the rules are specified by node trees or strings. All subclasses use the chain rule to differentiate. df(g(x),h(x))/dx -> df/dg * dg/dx + df/dh * dh/dx Variable names MUST be x,y for 1 to 2 variables or x1,x2,x3 for 3 for more variables.
| Field Summary | |
|---|---|
protected java.lang.String |
name
|
protected PostfixMathCommandI |
pfmc
|
protected Node[] |
rules
|
| Constructor Summary | |
|---|---|
ChainRuleDiffRules()
Cannot construct outside the context of a differentation visitor. |
|
| Method Summary | |
|---|---|
Node |
differentiate(ASTFunNode node,
java.lang.String var,
Node[] children,
Node[] dchildren,
DJep djep)
Use the chain rule to differentiate. |
java.lang.String |
getName()
returns the name of the function |
int |
getNumRules()
Returns the number of rules which should be number of arguments of function |
PostfixMathCommandI |
getPfmc()
returns the PostfixMathCommandI for the function. |
Node |
getRule(int i)
returns the i-th rule as an expression tree. |
java.lang.String |
toString()
Returns a string representation of the rule. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Field Detail |
|---|
protected java.lang.String name
protected PostfixMathCommandI pfmc
protected Node[] rules
| Constructor Detail |
|---|
public ChainRuleDiffRules()
| Method Detail |
|---|
public java.lang.String getName()
getName in interface DiffRulesIpublic PostfixMathCommandI getPfmc()
public int getNumRules()
public Node getRule(int i)
public Node differentiate(ASTFunNode node,
java.lang.String var,
Node[] children,
Node[] dchildren,
DJep djep)
throws ParseException
differentiate in interface DiffRulesIvar - The name of variable to differentiate wrt to.children - the arguments of the functiondchildren - the derivatives of each argument of the function.
ParseException - if there is some problem in compiling the derivative.public java.lang.String toString()
DiffRulesI
toString in interface DiffRulesItoString in class java.lang.Object
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