Ruby Issue Tracking System

08/02/2021

02:16 PM Ruby Feature #18057: Introduce Array#mean

@nobu - yup, you are correct. The expected behaviour should be like this
```ruby
[1,2].mean #=> 1.5
``` ggmichaelgo (Michael Go)

04:46 AM Ruby Feature #18057: Introduce Array#mean

Thank you @mrkn!
I didn't know about enumerable-statistics, and I can definitely use this in my projects!!
I wish I knew about it sooner! ggmichaelgo (Michael Go)

04:42 AM Ruby Feature #18057: Introduce Array#mean

I definitely prefer using `mean` over `average`!
ggmichaelgo (Michael Go)

01:50 AM Ruby Feature #18057: Introduce Array#mean

oh goodness... that is embarrassing... Thank you for catching my error... 🙏 ggmichaelgo (Michael Go)

01:26 AM Ruby Feature #18057: Introduce Array#mean

Hello Sawa! I apologize for the confusion... (this is my first time contributing, and I am hoping to contribute more :D)
For this function, I am trying to calculate the arithmetic mean.
I have been developing a stock price analytics ... ggmichaelgo (Michael Go)

12:22 AM Ruby Feature #18057: Introduce Array#mean

I have created PR for this feature :)
https://github.com/ruby/ruby/pull/4699
ggmichaelgo (Michael Go)

12:02 AM Ruby Feature #18057 (Open): Introduce Array#mean

Introduce Array#average to calculate the average value of an array.
```ruby
array = [1, 2, 3]
array.mean # 2
array = [1.5, 2.2, 3.1]
array.mean(&:round) # 2.3333333333333335
array = [-3, -2, -1]
array.mean { |e| e.abs } # 2
... ggmichaelgo (Michael Go)