stats_cdf_beta(3) [php man page]
STATS_CDF_BETA(3) 1 STATS_CDF_BETA(3) stats_cdf_beta - CDF function for BETA Distribution. Calculates any one parameter of the beta distribution given values for the others. SYNOPSIS
float stats_cdf_beta (float $par1, float $par2, float $par3, int $which) DESCRIPTION
Method Cumulative distribution function (P) is calculated directly by code associated with the following reference. DiDinato, A. R. and Morris, A. H. Algorithm 708: Significant Digit Computation of the Incomplete Beta Function Ratios. ACM Trans. Math. Softw. 18 (1993), 360-373. Computation of other parameters involve a search for a value that produces the desired value of P. The search relies on the mono- tonicity of P with the other parameter. Note The beta density is proportional to t^(A-1) * (1-t)^(B-1) Arguments P -- The integral from 0 to X of the chi-square distribution. Input range: [0, 1]. Q -- 1-P. Input range: [0, 1]. P + Q = 1.0. X -- Upper limit of integration of beta density. Input range: [0,1]. Search range: [0,1] Y -- 1-X. Input range: [0,1]. Search range: [0,1] X + Y = 1.0. A -- The first parame- ter of the beta density. Input range: (0, +infinity). Search range: [1D-100,1D100] B -- The second parameter of the beta density. Input range: (0, +infinity). Search range: [1D-100,1D100] STATUS -- 0 if calculation completed correctly -I if input parameter number I is out of range 1 if answer appears to be lower than lowest search bound 2 if answer appears to be higher than greatest search bound 3 if P + Q .ne. 1 4 if X + Y .ne. 1 BOUND -- Undefined if STATUS is 0 Bound exceeded by parameter number I if STATUS is negative. Lower search bound if STATUS is 1. Upper search bound if STATUS is 2. PARAMETERS
o $par1 - o $par2 - o $par3 - o $which - Integer indicating which of the next four argument values is to be calculated from the others. Legal range: 1..4 which = 1 : Calculate P and Q from X,Y,A and B which = 2 : Calculate X and Y from P,Q,A and B which = 3 : Calculate A from P,Q,X,Y and B which = 4 : Calculate B from P,Q,X,Y and A RETURN VALUES
STATUS -- 0 if calculation completed correctly -I if input parameter number I is out of range 1 if answer appears to be lower than lowest search bound 2 if answer appears to be higher than greatest search bound 3 if P + Q .ne. 1 4 if X + Y .ne. 1 PHP Documentation Group STATS_CDF_BETA(3)
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Rangegroup(3pm) LogReport's Lire Documentation Rangegroup(3pm) NAME
Lire::Group - Base class for implementation of the rangegroup aggregator SYNOPSIS
use Lire::Rangegroup; DESCRIPTION
This module is the base class for implementation of the rangegroup aggregator. This aggregator will split the DLF records based on a numerical field. The so-called range groups creates numerical classes (e.g. 1-10, 11-20, etc.) and the DLF record will be grouped with other records which are in the same class. CONSTRUCTOR
new( %params ) Creates a new instance of a group aggregator. In addition to the normal report operator parameters, the rangegroup aggregator can take several parameters: field This parameter is mandatory. It should be the name of the DLF field which will be used as key for this aggregator. range-size This parameter is mandatory. This will be used as the size of each range group. range-start The number at which the first range group starts. Defauls to 0. min-value Value lower than this number will be sorted in the first range group. max-value Value higher than this number will be sorted in the last range group. size-scale This parameter can be used to create a logarithmic scale. In this case, each new range group will be size-scale bigger than the one that comes before it. For example, setting range-size=5 and size-scale=2 will create ranges like [0-5>, [5-15>, [15-35>, ... METHODS
field( [$new_field] ) Returns the name of the DLF field which is used as grouping key. If the $new_field parameter is set, it changes the grouping field. This must be the name of a quantity type field in the report specifications DLF schema. range_start( [$new_start] ) Returns the number which is the starting bound of the first range group. If the $new_start parameter is set, it changes the starting bound of the first range group. This should either be a positive integer or the name of one of the report specification's parameter. range_size( [$new_size] ) Returns the width of each range group. If the $new_size parameter is set, it changes the width of each range group. This should either be a positive integer or the name of one of the report specification's parameter. min_value( [$new_min] ) Returns the number below which no new range groups will be created. If the $new_min is set, it changes the lower bound below which no new groups will be created. This should either be a number or the name of one of the report specification's parameter. max_value( [$new_max] ) Returns the number above which no new range groups will be created. If the $new_max is set, it changes the upper bound above which no new groups will be created. This should either be a number or the name of one of the report specification's parameter. size_scale( [$new_size_scale] ) Returns the multiplier that will be apply to each of the range group's width after the first one. When this attribute is greater than 1, it creates a logarithmic scale where each new ranges is $size_scale wider than the precedent one. If the $new_size_scale parameter is used, it changes the attribute to this new value. It should be a positive interger or can also be a parameter reference. SEE ALSO
Lire::ReportSpec(3pm), Lire::Group(3pm), Lire::ReportOperator(3pm), Lire::Aggregator(3pm) AUTHORS
Francis J. Lacoste <flacoste@logreport.org> Wolfgang Sourdeau <wsourdeau@logreport.org> VERSION
$Id: Rangegroup.pm,v 1.25 2006/07/30 10:50:17 vanbaal Exp $ COPYRIGHT
Copyright (C) 2001-2004 Stichting LogReport Foundation LogReport@LogReport.org This file is part of Lire. Lire is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with http://www.gnu.org/copyleft/gpl.html. Lire 2.1.1 2006-07-30 Rangegroup(3pm)