Frequency class: Difference between revisions
Jump to navigation
Jump to search
spelling and a couple more points |
m added internal link |
||
| Line 1: | Line 1: | ||
{{Glossary}} | {{Glossary}} | ||
The '''frequency class''' of an object is a measure of its | The '''frequency class''' of an object is a measure of its [[common]]ness. The frequency class of an object ''O'', in a given set of objects, is defined as ''x'' {{iff}} the most common object in the set, ''M'', is 2<sup>''x''</sup> times as common as ''O''. To wit: | ||
:[[File:FrequencyClass.png]] | :[[File:FrequencyClass.png]] | ||
Revision as of 23:54, 24 February 2022
The frequency class of an object is a measure of its commonness. The frequency class of an object O, in a given set of objects, is defined as x iff the most common object in the set, M, is 2x times as common as O. To wit:
Usage on the LifeWiki
Frequency classes given on the LifeWiki are computed relative to the most common object, block, using data from Catagolue's B3/S23/C1 census:
- FC(object) = log2(occurrences_of_block/occurrences_of_object)
- FC is displayed rounded to one decimal place
- Except for an object with an extremely small number of occurrences, an object's FC is highly likely to be stable over time
G1
For extremely rare objects, there might be enough occurrences for a large enough sample size in G1 but not C1. To calculate the frequency class using G1 data, take the standard formula and add 6.3; the number 6.3 was determined empirically. Make sure that the object being checked is one that doesn't get ignored in G1.
See also
- List of patterns by frequency class
- Common
- List of common still lifes
- List of common oscillators
- List of common spaceships
- Most common objects on Catagolue