Difference between revisions of "Pearson correlation"
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Zeno Gantner (talk | contribs) |
Zeno Gantner (talk | contribs) |
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== External links == | == External links == | ||
* [[Wikipedia: Pearson product-moment correlation coefficient]] | * [[Wikipedia: Pearson product-moment correlation coefficient]] | ||
| + | * [http://blog.chrislowis.co.uk/2008/11/24/ruby-gsl-pearson.html Implementing the Pearson correlation algorithm using Ruby and the GNU Scientific Library] by Chris Lowis | ||
[[Category: Similarity measure]] | [[Category: Similarity measure]] | ||
Latest revision as of 11:39, 9 February 2012
The Pearson correlation is also called Pearson product-moment correlation coefficient (PMCC). It measures the correlation (similarity) between to random variables (in collaborative filtering: user or item vectors). The values lie between -1 (opposite values) and +1 (equality).
