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Text::NSP::Measures::2D::Dice::dice 1.03

  Date Added: April 05, 2010  |  Visits: 611

Text::NSP::Measures::2D::Dice::dice

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Text::NSP::Measures::2D::Dice::dice is a Perl module to compute Dice coefficient for bigrams. SYNOPSIS Basic Usage use Text::NSP::Measures::2D::Dice::dice; my $npp = 60; my $n1p = 20; my $np1 = 20; my $n11 = 10; $dice_value = calculateStatistic( n11=>$n11, n1p=>$n1p, np1=>$np1, npp=>$npp); if( ($errorCode = getErrorCode())) { print STDERR $errorCode." - ".getErrorMessage()."n""; } else { print getStatisticName."value for bigram is ".$dice_value."n""; } Assume that the frequency count data associated with a bigram is stored in a 2x2 contingency table: word2 ~word2 word1 n11 n12 | n1p ~word1 n21 n22 | n2p -------------- np1 np2 npp where n11 is the number of times < word1 >< word2 > occur together, and n12 is the number of times < word1 > occurs with some word other than word2, and n1p is the number of times in total that word1 occurs as the first word in a bigram. The Dice Coefficient is defined as : 2 * n11 --------- np1 + n1p The Jaccard coefficient can also be computed by applying a transformation to the dice coefficient: $jaccard = $dice/(2-$dice) Methods calculateStatistic() - method to calculate the dice coefficient value INPUT PARAMS : $count_values .. Reference of an hash containing the count values computed by the count.pl program. RETURN VALUES : $dice .. Dice Coefficient value for this bigram. getStatisticName() - Returns the name of this statistic INPUT PARAMS : none RETURN VALUES : $name .. Name of the measure..

Requirements: No special requirements
Platforms: Linux
Keyword: Coefficient Dice Dice Coefficient Libraries Nsp Perl Perl Module Programming Value Values
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License: Freeware Size: 952.32 KB
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