Done with Class

assignments/A01_Python_Functions-jhr3kd-Copy1.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Assignment 1: Python Functions\n",
+    "## Computational Methods in Psychology (and Neuroscience)\n",
+    "### Psychology 4500/7559 --- Fall 2020\n",
+    "By: Per B. Sederberg, PhD\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Objectives\n",
+    "\n",
+    "Upon completion of this assignment, the student will be able to:\n",
+    "\n",
+    "1. Create and run a Python script\n",
+    "\n",
+    "2. Demonstrate the use of basic math and comparison operators\n",
+    "\n",
+    "3. Use conditional statements in Python\n",
+    "\n",
+    "4. Use the \"for\" statement to create loops\n",
+    "\n",
+    "5. Create custom functions, using parameters to make them generalizable\n",
+    "\n",
+    "6. Document code with in-code comments and docstrings\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Assignment\n",
+    "\n",
+    "- Read Think Python chapters 3, 5, and 6 (Functions, Conditionals and Recursion, and Fruitful Functions). Be sure to open a new Jupyter Notebook and type in \n",
+    "  the examples as you read through the text. You can also try the Exercises\n",
+    "  at the end of each chapter.\n",
+    "\n",
+    "- After you have read the chapters, write code in *this notebook* (***after making a copy and renaming it to have your userid in the title --- e.g., A01_Python_Functions_mst3k***) that performs the \n",
+    "  following tasks:\n",
+    "\n",
+    "  1. Get two numbers from the user \n",
+    "  2. Compare the numbers\n",
+    "  3. If the first number is smaller than the second, calculate the mean\n",
+    "  4. If the first number is larger than the second, calculate the difference\n",
+    "  5. If the two numbers are the same, calculate the factorial using a custom function\n",
+    "  6. Display the results (indicating what operation you did)\n",
+    "\n",
+    "- Test your code and debug as necessary.\n",
+    "\n",
+    "- ***When you are done, save this notebook as HTML (`File -> Download as -> HTML`) and upload it to the matching assignment on UVACollab.***\n",
+    "\n",
+    "## HINTS\n",
+    "\n",
+    "- Be sure to comment your code\n",
+    "- Make use of the `input` function to get numbers (see examples from class)\n",
+    "- Use the template below to calculate the factorial using a non-recursive\n",
+    "  function\n",
+    "  "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Name: Jerome Romualdez\n",
+    "# User ID: JHR3KD"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# ***finish this function replacing the `pass` with your code***\n",
+    "def factorial(n):\n",
+    "    \"\"\"\n",
+    "    Takes in a positive integer n and returns n!\n",
+    "    \"\"\"\n",
+    "    #***Did not include the input check and type check because I already have checks for those  before I make the function call\n",
+    "    # not needed already made check prior to call\n",
+    "    # make sure the input is an integer greater than or equal to 1\n",
+    "    if type(n) is not int:\n",
+    "        pass # not needed already made check prior to call\n",
+    "        \n",
+    "    \n",
+    "    # Initialize a variable to 1\n",
+    "    y = 1\n",
+    "    # Successively multiply the variable by the integers 2 up to n\n",
+    "    #Multiplying by x + 1 because counting startes at 0\n",
+    "    for x in range(n):\n",
+    "        y *= (x+1)\n",
+    "    \n",
+    "    # return the result\n",
+    "    return y\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Enter a number: 4\n",
+      "Enter another number: 4\n",
+      "The factorial of 4 is 24\n"
+     ]
+    }
+   ],
+   "source": [
+    "# ***your code here for reading in the numbers and operating correctly***\n",
+    "try:\n",
+    "    x = int(input(\"Enter a number: \"))\n",
+    "    y = int(input(\"Enter another number: \"))\n",
+    "    if(x < 1 or y < 1):\n",
+    "        raise Exception() \n",
+    "    # first input is smaller than second so get mean\n",
+    "    if(x < y):\n",
+    "        mean = ((x+y)/2)\n",
+    "        print(\"The mean of the two numbers is \" + str(mean))\n",
+    "    #second input is smaller than first so get difference\n",
+    "    elif (y < x):\n",
+    "        diff = (x - y)\n",
+    "        print(\"The difference of the two numbers is \" + str(diff))\n",
+    "    #inputs are the same so call factorial()\n",
+    "    else:\n",
+    "        print(\"The factorial of \" + str(x) + \" is \" + str(factorial(x)))\n",
+    "except:\n",
+    "    # if the input is not an int or is an int less than 1 display an error message\n",
+    "    print(\"Please enter a positive integer!\")\n",
+    "\n",
+    "\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Challenge problem (not required, but fun!)\n",
+    "\n",
+    "- Re-write the factorial function using a recursive algorithm.\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 59,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def factorial(n):\n",
+    "    \"\"\"\n",
+    "    Takes in a positive integer n and returns n!\n",
+    "    Reccursive method\n",
+    "    \"\"\"\n",
+    "    #base case\n",
+    "    if (n <= 1):\n",
+    "        return 1\n",
+    "    #recursive case\n",
+    "    else: return factorial(n-1)* n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
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