Figure 24 — Coefficients of angle @,; for a game c Algorithm 3 is the pseudo-code for our extractor CA. As shown in Lines 12, 15 and 16 he algorithm represents a player p of interest as the union of 0. = {6..1,0¢2,... 6, likes,|—1} or each of his/her games c, so that @ = 6; U @ U ...@c,). Then, it analyzes set @ to extract he following features: 8, Og and 0,q,x. The first two features are respectively the mean and he standard deviation of @,.; values in set 0; see Lines 18 and 19. These features summarize vith statistical measurements the general pattern seen in angle-based representations 0,.; of uasi-instantaneous like-counting ascensions occurring for games developed by player p. Finally eature 9,qnx 18 in fact an array with L values, where L € Nxo is the same parameter used by the revious extractors. As can be seen in Line 20, 6,47, contains the L highest angle values @,,; in et 0; that is, O,ank = |max)(@), max2(@),...max,(@)]. Intuitively, O,ang captures extreme cases f games developed by player p with very fast growth in their streams of like counts, especially ocused on like-counting ascensions that come right after temporal intervals with few new likes measurements 6, ; extracted from games to infer features that describe their maker. of new likes are elevated. For example, note that the absolute difference in plain count of new likes between intervals |t4,t5) and [t5,t¢) is equal to the corresponding difference for |t),t3) and [t3,t4), thus [Ac 4 — Ac.5| = |Ac.2 — Ac3| = 1. In spite of this fact, the corresponding angle-based differences are not the same, i.e., |O¢,4 — 8,5] > |Oc,2 — 9.3], since the counts of new likes are smaller in intervals [t4,ts) and |ts,t¢) than their peers in intervals |t2,f3) and [f3,t4). Additionally, the angle-based measurement 6, takes into account the size of the interval analyzed, that is ti+1 — tj, aS opposed to the corresponding count of new likes A,;. Due to the aforementioned distinctions between angles and plain counts of new likes, we propose to take advantage of one novel view on quasi-instantaneous game ascensions with extractor CA; it uses angle-based a ¥ = oe 7 < pe ae