edu.stanford.nlp.optimization.Function.java Source code

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Here is the source code for edu.stanford.nlp.optimization.Function.java

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package edu.stanford.nlp.optimization;

/**
 * An interface for double-valued functions over double arrays.
 *
 * @author <a href="mailto:klein@cs.stanford.edu">Dan Klein</a>
 * @version 1.0
 * @since 1.0
 */
public interface Function {
    /**
     * Returns the value of the function at a single point.
     *
     * @param x a <code>double[]</code> input
     * @return the function value at the input
     */
    double valueAt(double[] x);

    /**
     * Returns the number of dimensions in the function's domain
     *
     * @return the number of domain dimensions
     */
    int domainDimension();
}