?? 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();}
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