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java.lang.Objectca.nengo.math.impl.NewtonRootFinder
public class NewtonRootFinder
Root finder that uses Newton's method. Assumes that functions are generally increasing. TODO: test
Constructor Summary | |
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NewtonRootFinder(int maxIterations,
boolean additiveBoundarySearch)
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Method Summary | |
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float |
findRoot(Function function,
float startLow,
float startHigh,
float tolerance)
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public NewtonRootFinder(int maxIterations, boolean additiveBoundarySearch)
maxIterations
- Maximum search iterations to attempt before returning an erroradditiveBoundarySearch
- If true, when low and high boundaries need to be widened, a proportion
of their difference is added/substracted. If false, they are multiplied/divided by a constant.
False is a good idea for boundaries that should not cross zero.Method Detail |
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public float findRoot(Function function, float startLow, float startHigh, float tolerance)
findRoot
in interface RootFinder
function
- Function f(x) to find root ofstartLow
- Low-valued x from which to start searchstartHigh
- High-valued x from which to start. You typically give startLow and startHigh so that
you expect the signs of the functions at these values to be different.tolerance
- Max acceptable |f(x)| for which to return x
RootFinder.findRoot(ca.nengo.math.Function, float, float, float)
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