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| <div class="block">This package is dedicated to streaming algorithms that enable estimation of the |
| frequency of occurrence of items in a weighted multiset stream of items. |
| If the frequency distribution of items is sufficiently skewed, these algorithms are very |
| useful in identifying the "Heavy Hitters" that occurred most frequently in the stream. |
| The accuracy of the estimation of the frequency of an item has well understood error |
| bounds that can be returned by the sketch. |
| |
| <p>These algorithms are sometimes referred to as "TopN" algorithms.</p></div> |
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| <th class="colFirst" scope="row"><a href="ItemsSketch.html" title="class in org.apache.datasketches.frequencies">ItemsSketch</a><T></th> |
| <td class="colLast"> |
| <div class="block">This sketch is useful for tracking approximate frequencies of items of type <i><T></i> |
| with optional associated counts (<i><T></i> item, <i>long</i> count) that are members of a |
| multiset of such items.</div> |
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| <th class="colFirst" scope="row"><a href="ItemsSketch.Row.html" title="class in org.apache.datasketches.frequencies">ItemsSketch.Row</a><T></th> |
| <td class="colLast"> |
| <div class="block">Row class that defines the return values from a getFrequentItems query.</div> |
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| <div class="block">This sketch is useful for tracking approximate frequencies of <i>long</i> items with optional |
| associated counts (<i>long</i> item, <i>long</i> count) that are members of a multiset of |
| such items.</div> |
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| <td class="colLast"> |
| <div class="block">Row class that defines the return values from a getFrequentItems query.</div> |
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| <th class="colFirst" scope="row"><a href="ErrorType.html" title="enum in org.apache.datasketches.frequencies">ErrorType</a></th> |
| <td class="colLast"> |
| <div class="block">Specifies one of two types of error regions of the statistical classification Confusion Matrix |
| that can be excluded from a returned sample of Frequent Items.</div> |
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