Math_Stats
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Element index for package Math_Stats

[ a ] [ b ] [ c ] [ f ] [ g ] [ h ] [ i ] [ k ] [ m ] [ p ] [ q ] [ r ] [ s ] [ v ] [ _ ]

_

$_calculatedValues
in file Stats.php, variable Base::$_calculatedValues
    Array for caching result values, should be reset when using setData()
$_data
in file Stats.php, variable Base::$_data
    The simple or cummulative data set.
$_dataExpanded
in file Stats.php, variable Base::$_dataExpanded
    Expanded data set. Only set when cummulative data is being used. Null by default.
$_dataOption
in file Stats.php, variable Base::$_dataOption
    Flag for data type, one of STATS_DATA_SIMPLE or STATS_DATA_CUMMULATIVE. Null by default.
$_nullOption
in file Stats.php, variable Base::$_nullOption
    Flag for null handling options. One of STATS_REJECT_NULL, STATS_IGNORE_NULL or STATS_USE_NULL_AS_ZERO
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a

absDev
in file Stats.php, method Base::absDev()
    Calculates the absolute deviation of the data points in the set Handles cummulative data sets correctly
absDevWithMean
in file Stats.php, method Base::absDevWithMean()
    Calculates the absolute deviation of the data points in the set given a fixed mean (average) value. Not used in calcBasic(), calcFull() or calc().
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b

Base
in file Stats.php, class Base
    A class to calculate descriptive statistics from a data set.
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c

calc
in file Stats.php, method Base::calc()
    Calculates the basic or full statistics for the data set
calcBasic
in file Stats.php, method Base::calcBasic()
    Calculates a basic set of statistics
calcFull
in file Stats.php, method Base::calcFull()
    Calculates a full set of statistics
center
in file Stats.php, method Base::center()
    Transforms the data by substracting each entry from the mean.
coeffOfVariation
in file Stats.php, method Base::coeffOfVariation()
    Calculates the coefficient of variation of a data set.
count
in file Stats.php, method Base::count()
    Calculates the number of data points in the set Handles cummulative data sets correctly
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f

frequency
in file Stats.php, method Base::frequency()
    Calculates the value frequency table of a data set.
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g

geometricMean
in file Stats.php, method Base::geometricMean()
    Calculates the geometrical mean of the data points in the set Handles cummulative data sets correctly
getData
in file Stats.php, method Base::getData()
    Returns the data which might have been modified according to the current null handling options.
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h

harmonicMean
in file Stats.php, method Base::harmonicMean()
    Calculates the harmonic mean of the data points in the set Handles cummulative data sets correctly
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i

interquartileMean
in file Stats.php, method Base::interquartileMean()
    The interquartile mean is defined as the mean of the values left after discarding the lower 25% and top 25% ranked values, i.e.:
interquartileRange
in file Stats.php, method Base::interquartileRange()
    The interquartile range is the distance between the 75th and 25th percentiles. Basically the range of the middle 50% of the data set, and thus is not affected by outliers or extreme values.
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k

kurtosis
in file Stats.php, method Base::kurtosis()
    Calculates the kurtosis of the data distribution in the set The kurtosis measures the degrees of peakedness of a distribution.
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m

Math_Stats
in file Stats.php, method Base::Math_Stats()
    Constructor for the class
max
in file Stats.php, method Base::max()
    Calculates the maximum of a data set.
mean
in file Stats.php, method Base::mean()
    Calculates the mean (average) of the data points in the set Handles cummulative data sets correctly
median
in file Stats.php, method Base::median()
    Calculates the median of a data set.
midrange
in file Stats.php, method Base::midrange()
    Calculates the midrange of a data set.
min
in file Stats.php, method Base::min()
    Calculates the minimum of a data set.
mode
in file Stats.php, method Base::mode()
    Calculates the mode of a data set.
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p

percentile
in file Stats.php, method Base::percentile()
    The pth percentile is the value such that p% of the a sorted data set is smaller than it, and (100 - p)% of the data is larger.
product
in file Stats.php, method Base::product()
    Calculates PROD { (xi) }, (the product of all observations) Handles cummulative data sets correctly
productN
in file Stats.php, method Base::productN()
    Calculates PROD { (xi)^n }, which is the product of all observations Handles cummulative data sets correctly
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q

quartileDeviation
in file Stats.php, method Base::quartileDeviation()
    The quartile deviation is half of the interquartile range value
quartiles
in file Stats.php, method Base::quartiles()
    The quartiles are defined as the values that divide a sorted data set into four equal-sized subsets, and correspond to the 25th, 50th, and 75th percentiles.
quartileSkewnessCoefficient
in file Stats.php, method Base::quartileSkewnessCoefficient()
    The quartile skewness coefficient (also known as Bowley Skewness), is defined as follows:
quartileVariationCoefficient
in file Stats.php, method Base::quartileVariationCoefficient()
    The quartile variation coefficient is defines as follows:
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r

range
in file Stats.php, method Base::range()
    Calculates the range of the data set = max - min
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s

Stats.php
procedural page Stats.php
sampleCentralMoment
in file Stats.php, method Base::sampleCentralMoment()
    Calculates the nth central moment (m{n}) of a data set.
sampleRawMoment
in file Stats.php, method Base::sampleRawMoment()
    Calculates the nth raw moment (m{n}) of a data set.
setData
in file Stats.php, method Base::setData()
    Sets and verifies the data, checking for nulls and using the current null handling option
setNullOption
in file Stats.php, method Base::setNullOption()
    Sets the null handling option.
skewness
in file Stats.php, method Base::skewness()
    Calculates the skewness of the data distribution in the set The skewness measures the degree of asymmetry of a distribution, and is related to the third central moment of a distribution.
STATS_BASIC
in file Stats.php, constant STATS_BASIC
    STATS_BASIC to generate the basic descriptive statistics
STATS_DATA_CUMMULATIVE
in file Stats.php, constant STATS_DATA_CUMMULATIVE
    STATS_DATA_CUMMULATIVE for an associative array of frequency values,
STATS_DATA_SIMPLE
in file Stats.php, constant STATS_DATA_SIMPLE
    STATS_DATA_SIMPLE for an array of numeric values. This is the default.
STATS_FULL
in file Stats.php, constant STATS_FULL
    STATS_FULL to generate also higher moments, mode, median, etc.
STATS_IGNORE_NULL
in file Stats.php, constant STATS_IGNORE_NULL
    STATS_IGNORE_NULL, ignore null values and prune them from the data.
STATS_REJECT_NULL
in file Stats.php, constant STATS_REJECT_NULL
    STATS_REJECT_NULL, reject data sets with null values. This is the default.
STATS_USE_NULL_AS_ZERO
in file Stats.php, constant STATS_USE_NULL_AS_ZERO
    STATS_USE_NULL_AS_ZERO, assign the value of 0 (zero) to null values.
stdErrorOfMean
in file Stats.php, method Base::stdErrorOfMean()
    Calculates the standard error of the mean.
stDev
in file Stats.php, method Base::stDev()
    Calculates the standard deviation (unbiased) of the data points in the set Handles cummulative data sets correctly
stDevWithMean
in file Stats.php, method Base::stDevWithMean()
    Calculates the standard deviation (unbiased) of the data points in the set given a fixed mean (average) value. Not used in calcBasic(), calcFull() or calc().
studentize
in file Stats.php, method Base::studentize()
    Transforms the data by substracting each entry from the mean and dividing by its standard deviation. This will reset all pre-calculated values to their original (unset) defaults.
sum
in file Stats.php, method Base::sum()
    Calculates SUM { xi } Handles cummulative data sets correctly
sum2
in file Stats.php, method Base::sum2()
    Calculates SUM { (xi)^2 } Handles cummulative data sets correctly
sumN
in file Stats.php, method Base::sumN()
    Calculates SUM { (xi)^n } Handles cummulative data sets correctly
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v

variance
in file Stats.php, method Base::variance()
    Calculates the variance (unbiased) of the data points in the set Handles cummulative data sets correctly
varianceWithMean
in file Stats.php, method Base::varianceWithMean()
    Calculates the variance (unbiased) of the data points in the set given a fixed mean (average) value. Not used in calcBasic(), calcFull() or calc().
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Documentation generated on Fri, 12 Oct 2012 00:15:04 +0200 by phpDocumentor 1.4.4