stats_covariance

(PECL stats >= 1.0.0)

stats_covariance — Computes the covariance of two data sets

说明

stats_covariance ( array $a , array $b ) : float

Returns the covariance of a and b.

参数

a

The first array

b

The second array

返回值

Returns the covariance of a and b, or FALSE on failure.

相关文章
php apc 函数 cache a variable in the data storephp ncurses 函数 sets windows color pairingsphp odbc 函数 handling of binary column dataphp ps 函数 sets border style of annotationsphp session 函数 write session data and end sessionphp socket 函数 sets nonblocking mode for file descriptor fdphp sqlite 函数 decode binary data passed as parameters to an udfphp statistic 函数 calculates any one parameter of the non central t distribution give values for the othersphp statistic 函数 computes the covariance of two data setsphp statistic 函数 probability mass function of the binomial distributionphp statistic 函数 computes the kurtosis of the data in the arrayphp statistic 函数 generates a random deviate from the binomial distributionphp statistic 函数 generate two seeds for the rgn random number generatorphp statistic 函数 computes the skewness of the data in the arrayphp statistic 函数 returns a binomial coefficientphp statistic 函数 returns the pearson correlation coefficient of two data setsphp statistic 函数 returns the t value from the independent two sample t testphp statistic 函数 returns the inner product of two vectorsphp com 函数 compares two variantsphp mongocursor sets whether this cursor will wait for a while for a tailable cursor to return more data
关注编程学问公众号