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Occurrence points were then filtered using different proximity values in each of the three classes; for occurrences in class 1, points <50 km from each other were removed; for points within class 2, 35 km was used as a filter distance; and for class 3, 20 km was used in the distance filter.
Table 2 Summary of manually-classified paragraphs Class Frequency of Occurrence Empty 117 Experimental 238 Non-experimental 445.
They are to human experience what "limit cases" are to certain kinds of math or science: classes of events or occurrences where extreme phenomenon reveal previously hidden truths.
They are to human experience what "limit cases" are to certain kinds of math or science: classes of events or occurrences where extreme phenomena reveal previously hidden truths.
We then perform several iterations of class merging, where the class with the smallest number of occurrences (bar {P}') is merged with the most similar class (bar {P}").
The vertical line at x = 0 depicts the 'ideal' number of occurrences per class, where each class is sampled proportionally to its number of known species.
Thirty-two distinct restriction fragments, comprising 3 allelic classes by frequency of occurrence, have thus far been detected in a sample size of approximately 800 caucasians.
Only six of the 24 classes had a median number of occurrences per species higher than 20.
Given that the primary problem leading to the need for POS classes is data sparsity for some POS sequences, we decided that the algorithm shall merge the POS class with the smallest number of occurrences in the training set with the most similar POS class.
Red dots indicate negative deviations (i.e. shortfall in occurrences = under-represented classes); green dots indicate positive deviations (i.e. excess of occurrences = over-represented classes).
Between these extremes, the relative proportion of specimen- vs observation-based occurrences in the 24 classes formed a continuum, with a few classes having an almost equivalent number of occurrences of both origins (e.g. Insecta).
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