<< Click to Display Table of Contents >> Navigation:  5. Detailed description of the Actions > 5.18. TA - Stats > 5.18.3. Line Regression

 

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Function: LineEst
 

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Short description:

 

Compute a linear regression, row-by-row.

 

Long Description:

 

Compute a linear regression by row, when each column corresponds to an equal interval of time. When working with time series, this is often a very useful transformation as it allows to compute the trend overtime at a row level.

 

Typically, we compute: trend at 3,6,12 and 24 months. The LineEst note output consists of two variables: Beta 0 and Beta 1. Those variables are also useful inputs of segmentation, much easier to deal with than original purchase history.