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This OSGi bundle wraps poi, poi-contrib, poi-ooxml, poi-ooxml-schemas and poi-scratchpad ${pkgVersion} jar files.

There is a newer version: 5.2.5_1

/*
* Copyright (c) 2005, Graph Builder
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Graph Builder nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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*/

package com.graphbuilder.math.func;

import com.graphbuilder.math.PascalsTriangle;

/**
The combination function.

@see com.graphbuilder.math.PascalsTriangle
*/
public class CombinFunction implements Function {
	
	private final PascalsTriangle pascalsTriangle = new PascalsTriangle();

	public CombinFunction() {}

	/**
	Returns the number of ways r items can be chosen from n items.  The value of
	n is (int) d[0] and the value of r is (int) d[1].
	*/
	public double of(double[] d, int numParam) {
		int n = (int) d[0];
		int r = (int) d[1];
		return pascalsTriangle.nCr(n, r);
	}

	/**
	Returns true only for 2 parameters, false otherwise.
	*/
	public boolean acceptNumParam(int numParam) {
		return numParam == 2;
	}

	public String toString() {
		return "combin(n, r)";
	}
}