umontreal.iro.lecuyer.hups
Class DigitalNetBase2FromFile

java.lang.Object
  umontreal.iro.lecuyer.hups.PointSet
      umontreal.iro.lecuyer.hups.DigitalNet
          umontreal.iro.lecuyer.hups.DigitalNetBase2
              umontreal.iro.lecuyer.hups.DigitalNetBase2FromFile

public class DigitalNetBase2FromFile
extends DigitalNetBase2

This class allows us to read the parameters defining a digital net in base 2 either from a file, or from a URL address on the World Wide Web. See the documentation in DigitalNetFromFile. The parameters used in building the net are those defined in class DigitalNetBase2. The format of the data files must be the following (where B is any C_j): (see the format in guidehups.pdf)

For each dimension j, there must be a k-vector of 32-bit integers (the a_i) corresponding to the columns of C_j. The correspondance is such that integer a_i = 2³⁰(C_j)_1i +2²⁹(C_j)_2i + ^... +2^31-r(C_j)_ri.

Constructor Summary

DigitalNetBase2FromFile(String filename, int s1)
Same as DigitalNetBase2FromFile(filename, r, 31, s1) where s1 is the dimension and r is given in data file filename.

DigitalNetBase2FromFile(String filename, int r1, int w, int s1)
Constructs a digital net in base 2 after reading its parameters from file filename.

Method Summary

static String	listDir(String dirname) Lists all files (or directories) in directory dirname.
String	toString() Formats a string that contains information about the point set.
String	toStringDetailed() Writes the parameters and the generating matrices of this digital net to a string.

Methods inherited from class umontreal.iro.lecuyer.hups.DigitalNetBase2

addRandomShift, addRandomShift, clearRandomShift, getCoordinate, getCoordinateNoGray, iBinomialMatrixScramble, iBinomialMatrixScrambleFaurePermut, iBinomialMatrixScrambleFaurePermutAll, iBinomialMatrixScrambleFaurePermutDiag, iterator, iteratorNoGray, leftMatrixScramble, leftMatrixScrambleDiag, leftMatrixScrambleFaurePermut, leftMatrixScrambleFaurePermutAll, leftMatrixScrambleFaurePermutDiag, printGeneratorMatrices, printGeneratorMatricesTrans, rightMatrixScramble, stripedMatrixScramble, stripedMatrixScrambleFaurePermutAll

Methods inherited from class umontreal.iro.lecuyer.hups.DigitalNet

eraseOriginalGeneratorMatrices, resetGeneratorMatrices, unrandomize

Methods inherited from class umontreal.iro.lecuyer.hups.PointSet

addRandomShift, addRandomShift, formatPoints, formatPoints, formatPoints, formatPoints, formatPointsBase, formatPointsBase, formatPointsBase, formatPointsBase, formatPointsNumbered, formatPointsNumbered, getDimension, getNumPoints, getStream, randomize, randomize, randomize, randomize, randomize, setStream

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DigitalNetBase2FromFile

public DigitalNetBase2FromFile(String filename,
                               int r1,
                               int w,
                               int s1)
                        throws IOException,
                               MalformedURLException

Constructs a digital net in base 2 after reading its parameters from file filename. See the documentation in DigitalNetFromFile. Parameter w gives the number of bits of resolution, r1 is the number of rows, and s1 is the dimension. Restrictions: s1 must be less than the maximal dimension, and r1 less than the maximal number of rows in the data file. Also w >= r1.

Parameters:

filename - Name of the file to be read

r1 - Number of rows for the generating matrices

w - Number of bits of resolution

s1 - Number of dimensions

Throws:

IOException

MalformedURLException

DigitalNetBase2FromFile

public DigitalNetBase2FromFile(String filename,
                               int s1)
                        throws IOException,
                               MalformedURLException

Same as DigitalNetBase2FromFile(filename, r, 31, s1) where s1 is the dimension and r is given in data file filename.

Parameters:

filename - Name of the file to be read

s1 - Number of dimensions

Throws:

IOException

MalformedURLException

Method Detail

toString

public String toString()

Description copied from class: PointSet

Formats a string that contains information about the point set.

Overrides:

toString in class DigitalNetBase2

Returns:

string representation of the point set information

toStringDetailed

public String toStringDetailed()

Writes the parameters and the generating matrices of this digital net to a string. This is useful to check that the file parameters have been read correctly.

listDir

public static String listDir(String dirname)
                      throws IOException

Lists all files (or directories) in directory dirname. Only relative pathnames should be used. The files are parameter files used in defining digital nets. For example, calling listDir("") will give the list of the main data directory in SSJ, while calling listDir("Edel/OOA2") will give the list of all files in directory Edel/OOA2.

Throws:

IOException