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com.hfg xml, html, svg, and bioinformatics utility library
package com.hfg.math;
//------------------------------------------------------------------------------
/**
* General mathmatical utility methods.
*
* @author J. Alex Taylor, hairyfatguy.com
*/
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------
public class MathUtil
{
private static final double LOG_OF_2 = Math.log(2);
//**************************************************************************
// PUBLIC FUNCTIONS
//**************************************************************************
//--------------------------------------------------------------------------
public static long factorial(int inNum)
{
long result = 1;
for (int factor = 2; factor <= inNum; factor++)
{
result *= factor;
}
return result;
}
//--------------------------------------------------------------------------
/**
Calculates the log base 2 fo the specified value.
@param inValue the input value for which to calculate the log2 value.
@return the log2 value
*/
public static double log2(double inValue)
{
return Math.log(inValue)/LOG_OF_2;
}
}