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User Guide

6.1
- 6.2
- 6.1.2

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correlation

The correlation analytic returns the correlation coefficient of list1 and list2. Use the correlation coefficient to determine the relationship between two lists of values. For example, you can examine the relationship between a list of an old stock price and a new stock price.

Syntax

correlation(list1,list2)

The following table describes the required and optional arguments for the correlation function:

Argument	Required Optional	Description
list1	Required	A list of values.
lis2	Required	A second list of values.

The following table provides the datatype for the parameters you can pass:

Parameter Input Options	Datatype
Watchlist values	Real number

Example

when 1 stocktopic with correlation(watchlist:stockprice,watchlist:stocknewprice) as result > 0 then response with body=" ${result}"

The following table describes the result for the event property value that you pass:

Event Property Value	Description	Result
Watchlist stockprice: 5,7,15 Watchlist stocknewprice: 9,13,18	Correlates the two concatenated watchlist values and returns the result.	0.96

Error Condition

The analytic does not run when there is a type mismatch, that is, when the values contain nonnumeric data. On type mismatch, the analytic returns an error, stops the rule evaluation, and writes the mismatch error to the log file.

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Table of Contents

User Guide

User Guide

correlation

correlation

Syntax

Error Condition