Читать книгу The Big R-Book - Philippe J. S. De Brouwer - Страница 288

R has four built-in functions to work with the normal distribution. They are described below.

 dnorm(x, mean, sd): The height of the probability distribution

 pnorm(x, mean, sd): The cumulative distribution function (the probability of the observation to be lower than x)

dnorm()

pnorm()

  qnorm(p, mean, sd): Gives a number whose cumulative value matches the given probability value p

 rnorm(n, mean, sd): Generates normally distributed variables,

qnorm()

rnorm()

with

 x: A vector of numbers

 p: A vector of probabilities

 n: The number of observations(sample size)

 mean: The mean value of the sample data (default is zero)

 sd: The standard deviation (default is 1).