Logistic 指令

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Logistic[ <Mean>, <Scale>, x ]

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Logistic[ <Mean>, <Scale>, x, <Boolean Cumulative> ]

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Logistic[ <Mean>, <Scale>, <Variable Value> ]

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Logistic[ <Mean μ>, <Scale s>, x ]

Creates probability density function (pdf) of logistic distribution with parameters μ, s.

Logistic[ <Mean μ>, <Scale s>, x, <Boolean Cumulative> ]

If Cumulative is true, creates cumulative distribution function of logistic distribution, otherwise creates pdf of logistic distribution.

Logistic[ <Mean μ>, <Scale s>, <Variable Value v> ]

Calculates the value of cumulative distribution function of logistic distribution at v, i.e. the probability P(X≤v) where X is a random variable with logistic distribution given by parameters μ, s.

备注： Returns the probability for a given x-coordinate's value (or area under the logistic distribution curve to the left of the given x-coordinate).

CAS Syntaxes

In CAS View only following syntax is supported:

Logistic[ <Mean μ>, <Scale s>, <Variable Value v>]

Calculates the value of cumulative distribution function of logistic distribution at v, i.e. the probability P(X≤v) where X is a random variable with log-normal distribution given by parameters μ, s.