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-{
- "cells": [
- {
- "cell_type": "markdown",
- "id": "6a76ef95",
- "metadata": {},
- "source": [
- "# Iteration Algorithms\n",
- "\n",
- "Thanks to CS 220 campus students for their data and to Meena for putting together the project.py file"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "103da70b",
- "metadata": {},
- "source": [
- "## Learning Objectives\n",
- "\n",
- "- Iterate through a dataset using for idx in range(project.count())\n",
- "- Compute the frequency of data that meets a certain criteria\n",
- "- Find the maximum or minimum value of a numeric column in a dataset\n",
- " - Handle missing numeric values when computing a maximum / minimum\n",
- " - Use the index of a maximum or minimum to access other information about that data item\n",
- "- Use break and continue in for loops when processing a dataset"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 1,
- "id": "28961628",
- "metadata": {},
- "outputs": [],
- "source": [
- "import project"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 2,
- "id": "d1dca7ae",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "Help on module project:\n",
- "\n",
- "NAME\n",
- " project\n",
- "\n",
- "FUNCTIONS\n",
- " __init__()\n",
- " \n",
- " count()\n",
- " This function will return the number of records in the dataset\n",
- " \n",
- " get_age(idx)\n",
- " get_age(idx) returns the age of the student in row idx\n",
- " \n",
- " get_latitude(idx)\n",
- " get_latitude(idx) returns the latitude of the student's favourite place in row idx\n",
- " \n",
- " get_lecture(idx)\n",
- " get_lecture(idx) returns the lecture of the student in row idx\n",
- " \n",
- " get_longitude(idx)\n",
- " get_longitude(idx) returns the longitude of the student's favourite place in row idx\n",
- " \n",
- " get_major(idx)\n",
- " get_major(idx) returns the major of the student in row idx\n",
- " \n",
- " get_pet_owner(idx)\n",
- " get_pet_owner(idx) returns the pet preference of student in row idx\n",
- " \n",
- " get_piazza_topping(idx)\n",
- " get_piazza_topping(idx) returns the preferred pizza toppings of the student in row idx\n",
- " \n",
- " get_procrastinator(idx)\n",
- " get_procrastinator(idx) returns whether student in row idx is a procrastinator\n",
- " \n",
- " get_runner(idx)\n",
- " get_runner(idx) returns whether student in row idx is a runner\n",
- " \n",
- " get_sleep_habit(idx)\n",
- " get_sleep_habit(idx) returns the sleep habit of the student in row idx\n",
- " \n",
- " get_zip_code(idx)\n",
- " get_zip_code(idx) returns the residential zip code of the student in row idx\n",
- "\n",
- "DATA\n",
- " __student__ = [{'Age': '22', 'Latitude': '43.073051', 'Lecture': 'LEC0...\n",
- "\n",
- "FILE\n",
- " /Users/andrewkuemmel/cs220-f22/lectures/lec12_Oct03_IterationAlgorithms/project.py\n",
- "\n",
- "\n"
- ]
- }
- ],
- "source": [
- "# TODO: inspect the project module's documentation by using help\n",
- "help(project)"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "7fb78f6b",
- "metadata": {},
- "source": [
- "### How many students does the dataset have?"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 4,
- "id": "d67a080f",
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "992"
- ]
- },
- "execution_count": 4,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "project.count()"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "3c97d494",
- "metadata": {},
- "source": [
- "### What is the age of the student at index 10?"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 5,
- "id": "bde8dc35",
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "'21'"
- ]
- },
- "execution_count": 5,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "id_10_age = project.get_age(10)\n",
- "id_10_age"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 6,
- "id": "b0f87a2c",
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "str"
- ]
- },
- "execution_count": 6,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "# TODO: what is the return value type of the get_age function? \n",
- "type(id_10_age)\n",
- "\n",
- "# in a CSV file, all data stored as a string"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "37898141",
- "metadata": {},
- "source": [
- "### What is the lecture number of the student at index 20?"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 7,
- "id": "ba993090",
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "'LEC001'"
- ]
- },
- "execution_count": 7,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "project.get_lecture(20)"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "6e3e3c0a",
- "metadata": {},
- "source": [
- "### What are the age and pizza choices of the first 10 students? \n",
- "\n"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 10,
- "id": "46ec7632",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "22 none (just cheese)\n",
- " none (just cheese)\n",
- "18 none (just cheese)\n",
- " none (just cheese)\n",
- " none (just cheese)\n",
- "18 none (just cheese)\n",
- " none (just cheese)\n",
- "18 pineapple\n",
- "18 none (just cheese)\n",
- "18 pepperoni\n"
- ]
- }
- ],
- "source": [
- "for i in range(10):\n",
- " print(project.get_age(i), project.get_piazza_topping(i))"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "af3d9d8c",
- "metadata": {},
- "source": [
- "### How many current lecture (example: LEC001) students are in the dataset? \n",
- "\n"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 13,
- "id": "e024c488",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "195\n"
- ]
- }
- ],
- "source": [
- "frequency = 0\n",
- "for i in range(project.count()):\n",
- " if project.get_lecture(i) == \"LEC001\":\n",
- " frequency += 1\n",
- "print(frequency)\n",
- " "
- ]
- },
- {
- "cell_type": "markdown",
- "id": "b9ff6434",
- "metadata": {},
- "source": [
- "### What is the age of the oldest student in the course? \n",
- "\n"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 19,
- "id": "38bd778a",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "53\n"
- ]
- }
- ],
- "source": [
- "# find the maximum\n",
- "# check for missing data\n",
- "# check for data out of range \n",
- "\n",
- "max_age = 0\n",
- "for i in range(project.count()):\n",
- " if project.get_age(i) == '': \n",
- " continue\n",
- " age = int(project.get_age(i))\n",
- " if age < 0 or age > 100:\n",
- " continue\n",
- " if age > max_age:\n",
- " max_age = age\n",
- "print(max_age)"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "b40a32fb",
- "metadata": {},
- "source": [
- "### What is the age of the youngest student in current lecture (example: LEC001)?\n",
- "- use similar algorithm as above question"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 23,
- "id": "ea77e0cd",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "22\n"
- ]
- }
- ],
- "source": [
- "min_age = int(project.get_age(0) ) #assume first student is youngest,and has age\n",
- "for i in range(project.count()):\n",
- " if project.get_lecture != \"LEC001\":\n",
- " continue\n",
- " if project.get_age(i) == '': \n",
- " continue\n",
- " age = int(project.get_age(i))\n",
- " if age < 0 or age > 100:\n",
- " continue\n",
- " if age < min_age:\n",
- " min_age = age\n",
- "print(min_age)"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "296c2a49",
- "metadata": {},
- "source": [
- "### What is the average age of students enrolled in CS220 / CS319?\n"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 38,
- "id": "8b7c8367",
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "19.608180839612487"
- ]
- },
- "execution_count": 38,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "total_age = 0\n",
- "num_students_with_age = 0\n",
- "for i in range(project.count()):\n",
- " if project.get_age(i) == '': \n",
- " continue\n",
- " age = int(project.get_age(i))\n",
- " if age < 0 or age > 100:\n",
- " continue\n",
- " total_age += age\n",
- " num_students_with_age += 1\n",
- "average_age = total_age / num_students_with_age\n",
- "average_age"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "48f1c791",
- "metadata": {},
- "source": [
- "### What major is the youngest student in current lecture (example: LEC001) planning to declare?\n",
- "- now, we need to find some other detail about the youngest student\n",
- "- often, you'll have to keep track of ID of the max or min, so that you can retrive other details about that data entry"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 36,
- "id": "a524873b",
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "17"
- ]
- },
- "execution_count": 36,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "# we will do this in lecture on Wednesday\n",
- " "
- ]
- },
- {
- "cell_type": "markdown",
- "id": "5294702a",
- "metadata": {},
- "source": [
- "### Considering current lecture students (example: LEC001), what is the age of the first student residing at zip code 53715?"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 33,
- "id": "fada2a40",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "19 <class 'str'>\n"
- ]
- }
- ],
- "source": [
- "for i in range(project.count()):\n",
- " # put a print statement here\n",
- " if project.get_lecture(i) == \"LEC002\" and project.get_zip_code(i) == \"53715\":\n",
- " print(project.get_age(i), type(project.get_age(i)))\n",
- " break"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 25,
- "id": "772f7a58",
- "metadata": {},
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "Help on module project:\n",
- "\n",
- "NAME\n",
- " project\n",
- "\n",
- "FUNCTIONS\n",
- " __init__()\n",
- " \n",
- " count()\n",
- " This function will return the number of records in the dataset\n",
- " \n",
- " get_age(idx)\n",
- " get_age(idx) returns the age of the student in row idx\n",
- " \n",
- " get_latitude(idx)\n",
- " get_latitude(idx) returns the latitude of the student's favourite place in row idx\n",
- " \n",
- " get_lecture(idx)\n",
- " get_lecture(idx) returns the lecture of the student in row idx\n",
- " \n",
- " get_longitude(idx)\n",
- " get_longitude(idx) returns the longitude of the student's favourite place in row idx\n",
- " \n",
- " get_major(idx)\n",
- " get_major(idx) returns the major of the student in row idx\n",
- " \n",
- " get_pet_owner(idx)\n",
- " get_pet_owner(idx) returns the pet preference of student in row idx\n",
- " \n",
- " get_piazza_topping(idx)\n",
- " get_piazza_topping(idx) returns the preferred pizza toppings of the student in row idx\n",
- " \n",
- " get_procrastinator(idx)\n",
- " get_procrastinator(idx) returns whether student in row idx is a procrastinator\n",
- " \n",
- " get_runner(idx)\n",
- " get_runner(idx) returns whether student in row idx is a runner\n",
- " \n",
- " get_sleep_habit(idx)\n",
- " get_sleep_habit(idx) returns the sleep habit of the student in row idx\n",
- " \n",
- " get_zip_code(idx)\n",
- " get_zip_code(idx) returns the residential zip code of the student in row idx\n",
- "\n",
- "DATA\n",
- " __student__ = [{'Age': '22', 'Latitude': '43.073051', 'Lecture': 'LEC0...\n",
- "\n",
- "FILE\n",
- " /Users/andrewkuemmel/cs220-f22/lectures/lec12_Oct03_IterationAlgorithms/project.py\n",
- "\n",
- "\n"
- ]
- }
- ],
- "source": [
- "help(project)"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "68793d99",
- "metadata": {},
- "source": [
- "## Self-practice"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "2eeed867",
- "metadata": {},
- "source": [
- "### How many current lecture (example: LEC001) students are runners? "
- ]
- },
- {
- "cell_type": "markdown",
- "id": "1ea57e12",
- "metadata": {},
- "source": [
- "### How many current lecture (example: LEC001) students are procrastinators? "
- ]
- },
- {
- "cell_type": "markdown",
- "id": "cf0ac7c8",
- "metadata": {},
- "source": [
- "### How many current lecture (example: LEC001) students own or have owned a pet?"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "ffd5e10f",
- "metadata": {},
- "source": [
- "### What sleep habit does the youngest student in current lecture (example: LEC001) have?\n",
- "- try to solve this from scratch, instead of copy-pasting code to find mimimum age"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "f255b95a",
- "metadata": {},
- "source": [
- "### What sleep habit does the oldest student in current lecture (example: LEC001) have?\n",
- "- try to solve this from scratch, instead of copy-pasting code to find mimimum age"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "70a8ac57",
- "metadata": {},
- "source": [
- "### What is the minimum latitude (& corresponding longitude) of a student's place of interest? \n",
- "- What place is this -> try to enter the lat, long on Google maps?"
- ]
- },
- {
- "cell_type": "markdown",
- "id": "581ea197",
- "metadata": {},
- "source": [
- "### What is the maximum latitude (& corresponding longitude) of a student's place of interest? \n",
- "- What place is this -> try to enter the lat, long on Google maps?"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": null,
- "id": "fcee0994",
- "metadata": {},
- "outputs": [],
- "source": []
- }
- ],
- "metadata": {
- "kernelspec": {
- "display_name": "Python 3 (ipykernel)",
- "language": "python",
- "name": "python3"
- },
- "language_info": {
- "codemirror_mode": {
- "name": "ipython",
- "version": 3
- },
- "file_extension": ".py",
- "mimetype": "text/x-python",
- "name": "python",
- "nbconvert_exporter": "python",
- "pygments_lexer": "ipython3",
- "version": "3.9.12"
- }
- },
- "nbformat": 4,
- "nbformat_minor": 5
-}