www.giannistsakiris.com http://www.giannistsakiris.com mostly computer related stuff Sat, 09 Jan 2010 10:08:26 +0000 http://wordpress.org/?v=2.2 en Base-2 and Base-N logarithm calculation in Java http://www.giannistsakiris.com/index.php/2010/01/09/base-2-and-base-n-logarithm-calculation-in-java/ http://www.giannistsakiris.com/index.php/2010/01/09/base-2-and-base-n-logarithm-calculation-in-java/#comments Sat, 09 Jan 2010 10:08:26 +0000 giannis https://www.giannistsakiris.com/index.php/2010/01/09/base-2-and-base-n-logarithm-calculation-in-java/
One can easily calculate the logarithm of any base using the following simple equation:

log.png

Where logk is the function that returns the base-k logarithm of a number, and it can be any real number.

In terms of Java it can be written like this:
 public class Logarithm
{
public static double logb( double a, double b )
{
return Math.log(a) / Math.log(b);
}

public static double log2( double a )
{
return logb(a,2);
}

public static void main( String[] args )
{
System.out.println(log2(100));
}
}
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