(PECL trader >= 0.2.0)
trader_correl — Pearson's Correlation Coefficient (r)
$real0
, array $real1
[, integer $timePeriod
] )
real0浮点数数组。
real1浮点数数组。
timePeriodNumber of period. Valid range from 2 to 100000.
Returns an array with calculated data or false on failure.