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Statistics::Descriptive::Discrete 0.07

  Date Added: July 23, 2010  |  Visits: 653

Statistics::Descriptive::Discrete

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Statistics::Descriptive::Discrete is a Perl module to compute descriptive statistics for discrete data sets. SYNOPSIS use Statistics::Descriptive::Discrete; my $stats = new Statistics::Descriptive::Discrete; $stats->add_data(1,10,2,0,1,4,5,1,10,8,7); print "count = ",$stats->count(),"n"; print "uniq = ",$stats->uniq(),"n"; print "sum = ",$stats->sum(),"n"; print "min = ",$stats->min(),"n"; print "max = ",$stats->max(),"n"; print "mean = ",$stats->mean(),"n"; print "standard_deviation = ",$stats->standard_deviation(),"n"; print "variance = ",$stats->variance(),"n"; print "sample_range = ",$stats->sample_range(),"n"; print "mode = ",$stats->mode(),"n"; print "median = ",$stats->median(),"n"; This module provides basic functions used in descriptive statistics. It borrows very heavily from Statistics::Descriptive::Full (which is included with Statistics::Descriptive) with one major difference. This module is optimized for discretized data e.g. data from an A/D conversion that has a discrete set of possible values. E.g. if your data is produced by an 8 bit A/D then youd have only 256 possible values in your data set. Even though you might have a million data points, youd only have 256 different values in those million points. Instead of storing the entire data set as Statistics::Descriptive does, this module only stores the values its seen and the number of times its seen each value. For very large data sets, this storage method results in significant speed and memory improvements. In a test case with 2.6 million data points from a real world application, Statistics::Descriptive::Discrete took 40 seconds to calculate a set of statistics instead of the 561 seconds required by Statistics::Descriptive::Full. It also required only 4MB of RAM instead of the 400MB used by Statistics::Descriptive::Full for the same data set..

Requirements: No special requirements
Platforms: Linux
Keyword: Data Descriptive Descriptive Statistics Libraries Module Perl Module Print Programming Statistics Statisticsdescriptivediscrete
Users rating: 0/10

License: Freeware Size: 7.17 KB
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