Webinar file

mean.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Arithmetic Mean\n",
    "The **arithemetic mean** is is the sum of a *collection* of numbers divided by the count of numbers in the collection.\n",
    "\n",
    "Let's say we have the collection {3,1,4,1,5}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [],
   "source": [
    "collection←3 1 4 1 5 6"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "To find the mean, we first find the sum."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [],
   "source": [
    "sum←+⌿collection"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Then the count."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "count←≢collection"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Now divide sum by count."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
    "mean←sum÷count"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "And that's the mean"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<span style=\"white-space:pre; font-family: monospace\">26\n",
       "</span>"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "mean"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Dyalog APL",
   "language": "apl",
   "name": "dyalog-kernel"
  },
  "language_info": {
   "file_extension": ".apl",
   "mimetype": "text/apl",
   "name": "APL"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}