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Q: 

How to calculate the cointegration by PHP?

Hello,

I found stats_stat_correlation() http://php.net/manual/en/function.stats-stat-correlation.php to calculate the correlation between two array.

Now, I'm looking for a function to calculate the co-integration of two array, but, I didn't find nothing.

Could you help me? Are there a statistics libraries?

Thank you very much!

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