# Add a TRIMMEAN to averages or create new transform

**URL:** https://community.parabola.io/t/add-a-trimmean-to-averages-or-create-new-transform/231
**Category:** Feature Requests
**Tags:** Transform
**Created:** [March 26, 2020, 9:30pm UTC](https://community.parabola.io/t/add-a-trimmean-to-averages-or-create-new-transform/231 "2020-03-26T21:30:41Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Alton](https://avatars.discourse-cdn.com/v4/letter/a/f9ae1b/32.png) [@Alton](https://community.parabola.io/u/Alton)
#### Post date: [March 26, 2020, 9:30pm UTC](https://community.parabola.io/t/add-a-trimmean-to-averages-or-create-new-transform/231/1 "2020-03-26T21:30:41Z")

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1. What is your feature/integration request?  
A trimmean function takes a list of numbers and removes a portion of that list before calculating a mean for the new list. It takes two arguments 1. An array 2. a rational number between 0 and 1. It outputs a real number.

2. What problem would this feature/integration solve?  
It would help me with some statistical modeling and to remove numbers that fall in the 3rd and 4th standard deviations.

3. How do you solve/workaround this problem today?  
Google sheets.