PHPExcel

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Packages:
PHPExcel
com-tecnick-tcpdf
JAMA
Math_Stats
PHPExcel_CachedObjectStorage
PHPExcel_Calculation
PHPExcel_Cell
PHPExcel_Reader
PHPExcel_Reader_Excel5
PHPExcel_Reader_Excel2007
PHPExcel_RichText
PHPExcel_Settings
PHPExcel_Shared
PHPExcel_Shared_Best_Fit
PHPExcel_Shared_Escher
PHPExcel_Shared_OLE
PHPExcel_Shared_ZipArchive
PHPExcel_Style
PHPExcel_Worksheet
PHPExcel_Worksheet_Drawing
PHPExcel_Writer
PHPExcel_Writer_Excel5
PHPExcel_Writer_Excel2007

Files:

almohanad.php
arialunicid0-chinese-simplified.php
arialunicid0-chinese-traditional.php
arialunicid0-japanese.php
arialunicid0-korean.php
arialunicid0.php
Autoloader.php
CachedObjectStorageFactory.php
chinese.php
Comment.php
courier.php
credits.php
dejavusans.php
dejavusansb.php
dejavusansbi.php
dejavusanscondensed.php
dejavusanscondensedb.php
dejavusanscondensedbi.php
dejavusanscondensedi.php
dejavusansi.php
dejavusansmono.php
dejavusansmonob.php
dejavusansmonobi.php
dejavusansmonoi.php
dejavuserif.php
dejavuserifb.php
dejavuserifbi.php
dejavuserifcondensed.php
dejavuserifcondensedb.php
dejavuserifcondensedbi.php
dejavuserifcondensedi.php
dejavuserifi.php
docs.php
DocumentProperties.php
DocumentSecurity.php
download.php
example.php
footer.php
freemono.php
freemonob.php
freemonobi.php
freemonoi.php
freesans.php
freesansb.php
freesansbi.php
freesansi.php
freeserif.php
freeserifb.php
freeserifbi.php
freeserifi.php
HashTable.php
header.php
helvetica.php
helveticab.php
helveticabi.php
helveticai.php
hysmyeongjostdmedium.php
IComparable.php
index.php
IOFactory.php
kozgopromedium.php
kozminproregular.php
LagrangeInterpolation.php
LagrangeInterpolation2.php
LevenbergMarquardt.php
LMQuadTest.php
msungstdlight.php
NamedRange.php
navbar.php
package.php
pclzip.lib.php
PHPExcel.php
polyfit.php
ReferenceHelper.php
stsongstdlight.php
symbol.php
test.php
TestMatrix.php
tile.php
times.php
timesb.php
timesbi.php
timesi.php
trendClass.php
uni2cid_ac15.php
uni2cid_ag15.php
uni2cid_aj16.php
uni2cid_ak12.php
WorksheetIterator.php
zapfdingbats.php
zarbold.php

Interfaces:

PHPExcel_IComparable

Classes:

LagrangeInterpolation
LevenbergMarquardt
LMQuadTest
PclZip
PHPExcel
PHPExcel_Autoloader
PHPExcel_CachedObjectStorageFactory
PHPExcel_Comment
PHPExcel_DocumentProperties
PHPExcel_DocumentSecurity
PHPExcel_HashTable
PHPExcel_IOFactory
PHPExcel_NamedRange
PHPExcel_ReferenceHelper
PHPExcel_WorksheetIterator
TestMatrix
trendClass

Class: LevenbergMarquardt

Source Location: /PHPExcel/Shared/JAMA/examples/LevenbergMarquardt.php

Class Overview

Methods

Class Details

[line 7]

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Class Methods

method chiSquared [line 21]

void chiSquared(
double[][]
$x, double[]
$a, 
$y, 
$s, object
$f, double[]
$y,, double[]
$s,)

Calculate the current sum-squared-error

Chi-squared is the distribution of squared Gaussian errors, thus the name.

Parameters:

double[][]	$x
double[]	$a
double[]	$y,
double[]	$s,
object	$f
	$y
	$s

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method solve [line 57]

the solve(
x
$x, y
$a, a
$y, vary
$s, s2
$vary, lambda
$f, termepsilon
$lambda, maxiter
$termepsilon, verbose
$maxiter, 
$verbose)

Minimize E = sum {(y[k] - f(x[k],a)) / s[k]}^2 The individual errors are optionally scaled by s[k].

Note that LMfunc implements the value and gradient of f(x,a), NOT the value and gradient of E with respect to a!

Tags:

return:

new lambda for future iterations. Can use this and maxiter to interleave the LM descent with some other task, setting maxiter to something small.

Parameters:

x	$x	array of domain points, each may be multidimensional
y	$a	corresponding array of values
a	$y	the parameters/state of the model
vary	$s	false to indicate the corresponding a[k] is to be held fixed
s2	$vary	sigma^2 for point i
lambda	$f	blend between steepest descent (lambda high) and jump to bottom of quadratic (lambda zero). Start with 0.001.
termepsilon	$lambda	termination accuracy (0.01)
maxiter	$termepsilon	stop and return after this many iterations if not done
verbose	$maxiter	set to zero (no prints), 1, 2
	$verbose

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Documentation generated on Sun, 27 Feb 2011 16:32:28 -0800 by phpDocumentor 1.4.3