# Easy Chart Calculated Pens - Linear Regression

**URL:** <https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770>\
**Category:** Ignition\
**Created:** [July 12, 2017, 1:28pm UTC](https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770 "2017-07-12T13:28:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![alexraymond](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/alexraymond/32/16951_2.png) [@alexraymond](https://forum.inductiveautomation.com/u/alexraymond)\
**Post date:** [July 12, 2017, 1:28pm UTC](https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770/1 "2017-07-12T13:28:21Z")

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The online manual for 7.9 lists “Linear Regression” as one of the calculated pen types for the easy chart component. The description states “Will create a linear regression line for the driving pen.” I can’t find this option in the dropdown on the Easychart customizer. Is there additional documentation or is this not implemented yet?

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**Author:** ![KathyApplebaum](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kathyapplebaum/32/7261_2.png) [@KathyApplebaum](https://forum.inductiveautomation.com/u/KathyApplebaum)\
**Post date:** [July 12, 2017, 1:59pm UTC](https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770/2 "2017-07-12T13:59:18Z")

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It’s new in 7.9.4. What version are you using?

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [July 12, 2017, 2:03pm UTC](https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770/3 "2017-07-12T14:03:22Z")

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Might be worth annotating the online manual with “Since v7.9.4” or similar. Python’s online documentation has this throughout and it’s very helpful.

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**Author:** ![KathyApplebaum](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kathyapplebaum/32/7261_2.png) [@KathyApplebaum](https://forum.inductiveautomation.com/u/KathyApplebaum)\
**Post date:** [July 12, 2017, 2:05pm UTC](https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770/4 "2017-07-12T14:05:00Z")

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Already had a sticky note written to do that as soon as I’m done on the forum. 🙂

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<div class="post-metadata">

**Author:** ![alexraymond](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/alexraymond/32/16951_2.png) [@alexraymond](https://forum.inductiveautomation.com/u/alexraymond)\
**Post date:** [July 12, 2017, 2:38pm UTC](https://forum.inductiveautomation.com/t/easy-chart-calculated-pens-linear-regression/14770/5 "2017-07-12T14:38:50Z")

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Whoops…missed the new release. This is exactly what I’ve been looking for. Thanks.