org.antlr.runtime.misc.Stats Class Reference

List of all members.

Static Public Member Functions

static double stddev (int[] X)

static double avg (int[] X)

static int min (int[] X)

static int max (int[] X)

static int sum (int[] X)

static void writeReport (String filename, String data) throws IOException

static String getAbsoluteFileName (String filename)

Static Public Attributes

static final String ANTLRWORKS_DIR = "antlrworks"

Detailed Description

Stats routines needed by profiler etc...

note that these routines return 0.0 if no values exist in the X[] which is not "correct", but it is useful so I don't generate NaN in my output

Definition at line 39 of file Stats.java.

Member Function Documentation

static double org.antlr.runtime.misc.Stats.stddev ( int[] X ) [static]

Compute the sample (unbiased estimator) standard deviation following:

Computing Deviations: Standard Accuracy Tony F. Chan and John Gregg Lewis Stanford University Communications of ACM September 1979 of Volume 22 the ACM Number 9

The "two-pass" method from the paper; supposed to have better numerical properties than the textbook summation/sqrt. To me this looks like the textbook method, but I ain't no numerical methods guy.

Definition at line 54 of file Stats.java.

static double org.antlr.runtime.misc.Stats.avg ( int[] X ) [static]

Compute the sample mean

Definition at line 69 of file Stats.java.

static int org.antlr.runtime.misc.Stats.min ( int[] X ) [static]

Definition at line 84 of file Stats.java.

static int org.antlr.runtime.misc.Stats.max ( int[] X ) [static]

Definition at line 98 of file Stats.java.

static int org.antlr.runtime.misc.Stats.sum ( int[] X ) [static]

Definition at line 112 of file Stats.java.

static void org.antlr.runtime.misc.Stats.writeReport	(	String	filename,
		String	data
	)			throws IOException `[static]`

Definition at line 124 of file Stats.java.

static String org.antlr.runtime.misc.Stats.getAbsoluteFileName ( String filename ) [static]

Definition at line 139 of file Stats.java.

Member Data Documentation

final String org.antlr.runtime.misc.Stats.ANTLRWORKS_DIR = "antlrworks" [static]

Definition at line 40 of file Stats.java.

The documentation for this class was generated from the following file:

/Users/parrt/antlr/code/antlr/main/runtime/Java/src/org/antlr/runtime/misc/Stats.java


Static Public Member Functions
static double	stddev (int[] X)
static double	avg (int[] X)
static int	min (int[] X)
static int	max (int[] X)
static int	sum (int[] X)
static void	writeReport (String filename, String data) throws IOException
static String	getAbsoluteFileName (String filename)
Static Public Attributes
static final String	ANTLRWORKS_DIR = "antlrworks"