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WikiCards · Card list · Nature cards · Logistic function
Rare card · Nature
Logistic function, a Rare card
A logistic function or logistic curve is a common S-shaped curve with the equation f = L 1 + e − k where L is the carrying capacity, the supremum of the values of the function, k is the logistic growth rate, the steepness of the curve, and x 0 is the x value of the function's midpoint.
- Rarity
- Rare
- Domain
- Nature
- ATK
- 78
- DEF
- 75
- Power
- 153
- Wikipedia reads a year
- 220,000
Ranked #1,876 of the 3,000 cards of the base set by power (ATK + DEF).
Logistic function quiz: 3 questions
Three questions on the Logistic function card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
It is also sometimes called the expit, being the ______ function of the logit.
Answer
inverse. It is also sometimes called the expit, being the inverse function of the logit. From the Logistic function article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Emperor Taizong of Tang. Emperor Taizong of Tang 85 · Logistic function 78 · Stingray 74 · Beryl 71 ATK in WikiCards.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- The logistic function has domain the real numbers, the limit as x tends to − ∞ is 0, and the limit as x tends to + ∞ is L.
- The exponential function with negated argument is used to define the standard logistic function where L = 1, k = 1, x 0 = 0, which has the equation f = 1 1 + e − x and is sometimes simply called the sigmoid function.
- It is also sometimes called the expit, being the inverse function of the logit.
Why it is Rare
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Logistic function article was read about 220,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 78 and blocks with 75: each hit it takes is cut by 30 %.
How to get Logistic function
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Nature cards
Cards close in power
The cards just above and just below Logistic function in the power ranking, all domains together.
- Emperor Taizong of TangRare · History · ATK 85 DEF 68
- Kitasan BlackRare · Nature · ATK 74 DEF 79
- SarcopterygiiRare · Nature · ATK 75 DEF 78
- WheelRare · Science · ATK 75 DEF 78
- Arabic scriptRare · Society · ATK 86 DEF 67
- TramRare · Society · ATK 89 DEF 64
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Credits
Text : Wikipedia, Logistic function (revision), CC BY-SA 4.0. Photo : Qef ( talk ), Public domain, Wikimedia Commons.
