[SOLVED] CSE 6242 / CX 4242: Data and Visual Analytics | Georgia Tech

CSE 6242 / CX 4242: Data and Visual Analytics | Georgia Tech | Spring 2022
HW 2: Tableau, D3 Graphs and Visualization
Important Notes . 1
Submission Instructions . 1 Grading and Feedback .. 2 Download the HW2 Skeleton before you begin .. 2 Homework Overview 2 Q1 [25 points] Designing a good table. Visualizing data with Tableau. . 3

Copyright By Assignmentchef assignmentchef

Setting Up Tableau . 4 Important Points about Developing with D3 in Questions 25.. 7 Q2 [15 points] Force-directed graph layout . 8 Q3 [15 points] Line Charts . 10 Q4 [20 points] Interactive Visualization 14 Q5 [25 points] Choropleth Map of Board Game Ratings 19
Important Notes
1. Submit your work by this assignments official Due date on the course schedule.
a. Every assignment has a 48-hour grace period. You may use it without asking us.
b. Before the grace period expires, you may resubmit as many times as you need to.
c. Submissions during the grace period will display as late and will not incur a penalty. d. We will not accept any submissions after the grace period.
2. Always use the most up-to-date assignment (version number at bottom right of this document).
3. This advanced course expects students to submit code that runs and is free of syntax errors. Code
that does not run successfully will receive 0 credit.
4. You may discuss high-level ideas with other students at the whiteboard level (e.g., how cross
validation works, use HashMap instead of array) and review any relevant materials online. However,
each student must write up and submit the students own answers.
5. All incidents of suspected dishonesty, plagiarism, or violations of the Georgia Tech Honor Code will
be subject to the institutes Academic Integrity procedures, directly handled by the Office of Student Integrity (OSI). Consequences can be severe, e.g., academic probation or dismissal, a 0 grade for assignments concerned, and prohibition from withdrawing from the class.
6. Wherever you are asked for a written response, stay within the word limit or you may lose points.
Submission Instructions
Carefully read and follow the high-level instructions below, and the detailed instructions in each question.
Submit ALL deliverables via Gradescope. We will not accept submissions via any other channels. Submit all the required files, as specified at the beginning of each question. Any deviations from the specified format (extra files, misnamed files, etc.) will cause your submission to not be graded.
Each submission and its score will be recorded and saved by Gradescope. By default, Gradescope uses your last submission for grading. To use a different submission, you MUST activate it (click Submission History button at bottom toolbar, then Activate).

Grading and Feedback
The maximum possible score for this homework is 100 points. Students can choose to complete any 90 points worth of work to receive the full 15% of the final course grade, and can receive more than 15% if additional work is submitted. For example, if a student scores 100 points, that student will receive (100 / 90) * 15 = 16.67% course grade.
We will grade all questions using the Gradescope platform. Question 1 will be manually graded. Questions 2-5 are auto-graded. Based on our experience, students (you all!) benefit from using Gradescope to obtain feedback as they work on this assignment. Keep the following important points in mind:
1. You can access Gradescope through Canvas.
2. You may upload your code periodically to Gradescope to obtain feedback for your code. This is
accomplished by having Gradescope auto-grade your submission using the same test cases that we will use to grade your work. The test cases results may help inform you of potential errors and ways to improve your code.
3. You must not use Gradescope as the primary way to test your codes correctness, since it provides only a few test cases, and error messages may not be as informative as local debuggers. Iteratively develop and test your code locally, write more test cases, and follow good coding practices. Use Gradescope mainly as a final check.
4. Gradescope cannot run code that contains syntax errors. If Gradescope is not running your code, before seeking help, verify that:
a. Your code is free of syntax errors (by running it locally) b. All methods have been implemented
c. You have submitted the correct file with the correct name
5. When many students use Gradescope simultaneously, it may slow down or fail to communicate with the tester. It can become even slower as the submission deadline approaches. You are responsible for submitting your work on time.
Download the HW2 Skeleton before you begin Homework Overview
Visualization gives you answers to questions you didnt know you have
This homework focuses on exploring and creating data visualizations using two of the most popular tools in the field. Data visualization is an integral part of exploratory analysis and communicating key insights. All questions use data on the same topic to highlight the uses and strengths of different types of visualizations. The data comes from BoardGameGeek and includes games ratings, popularity, and metadata.
Q1 uses Tableau to connect to online data that feeds multiple visualizations including a table and bar charts. Q2Q5 uses D3 and includes graphs with different scales, network graphs, and a map.
Below are some terms you will often see in the questions:
Rating a value from 0 to 10 given to each game. BoardGameGeek calculates a games overall rating in different ways including Average and Bayes, so make sure you are using the correct rating called for in a question. A higher rating is better than a lower rating.
Rank the overall rank of a boardgame from 1 to n, with ranks closer to 1 being better and n being the total number of games. The rank may be for all games or for a subgroup of games such as abstract games or family games.

In Q1, you will design a table, a grouped bar chart, and a stacked bar chart with filters. The data for this question is hosted online and will help you practice connecting Tableau to online data sources.
Questions 2-5 highlight different features of D3. The provided skeletons scaffold coding in D3 with the most complete template code being provided for Q2. Q4 and Q5 provide scaled back templates. Q3 does not provide complete template code, and is an excellent opportunity to separate html, css, and js files because a separate js file can be used for each of the visualizations.
Q2: a network graph shows relationships between games. You will add interactive features like pinning nodes to give the viewer some control over the visualization.
Q3: you will explore temporal patterns in the BoardGameGeek data, using line charts to compare how the number of ratings grew from month to month for 8 games. You will also integrate additional data about board game rankings onto these line charts and explore the effect of axis scale choice on what information is emphasized in the graph.
Q4: you will create line charts that use interactive elements to display additional data. This time, the line charts will show the number of games with each rating for multiple years. You will then implement a bar chart that appears when you mouse over a point on the line chart.
Q5: you will create a choropleth map to explore the average rating of each game in different countries.
Q1 [25 points] Designing a good table. Visualizing data with Tableau.
Technology Tableau Desktop (Note: Dont use Tableau Prep) Allowed Libraries NA
Max runtime NA
Deliverables
Gradescope: After selecting HW2 Q1, click Submit Images. You will be taken to a list of questions for your assignment. Click Select images and submit the following four PNG images under the corresponding questions:
table.png: Image/screenshot of the table in Q1.a
grouped_barchart.png: Image of the chart in Q1.b
stacked_barchart_1.png: Image of the chart in Q1.c after filtering data for
Max.Players = 2
stacked_barchart_2.png: Image of the chart in Q1.c after filtering data for
Max.Players = 4
a. [5 points] Good table design. You want to help a board game design company analyze the current popular board game data from the website BoardGameGeek. Create a single well-designed table to visualize the data contained in popular_board_game.csv. You can use any tool (e.g., Excel, HTML, Pandas, Tableau) to create the table. If you choose to use a tool other than Tableau to make the table, you will still need to load the same data into Tableau for use in Q1b.
The company is interested in grouping popular games into support solo (minimum player = 1) and
not support solo (minimum player > 1), because single-player games require a different design strategy.
Instructions:
Your table should clearly communicate information about these two groups (games that support solo & games that do not support solo) simultaneously. For each group (Solo supported, Solo Not Supported), show:
3 version 1

1. Total number of games in each category (fighting, economic, )
2. The most representative game (game with the highest number of ratings) in each category. If more
than one game has the same rating, pick the game that you prefer.
3. Average rating of games in each category (use simple average), rounded to 2 decimal places
4. Average playtime of games in each category, rounded to 2 decimal places
5. In the bottom left corner below your table, include your GT username. (If you decide to use Tableau,
this can be done by including a caption when exporting an image of a worksheet or by adding a text
box to a dashboard. Refer to the tutorial here.)
6. Save the table as table.png. (If you decide to use Tableau, to save a worksheet image, go to
WorksheetExportImage. And to save a dashboard image, go to DashboardExport Image. Do not simply take a screenshot in Tableau since your image should have a high resolution.) However, you can take a screenshot If you decide to use HTML, Pandas, etc.
You may decide on the most meaningful column names to use, the number of columns, and the column order. Keep suggestions from the lecture in mind when designing your table. You are not limited to using only the techniques described in the lecture. For OMS students, the online lecture video pertaining to this topic is Week 4 Fixing Common Visualization Issues Fixing Bar Charts, Line Charts. For campus students, please review slide 52 and onwards of the lecture slides.
Setting Up Tableau
Tableau has provided us with student licenses for Tableau Desktop, available for Mac and Windows. Go to Tableau and select Products/Tableau Desktop. After installation, you will be asked to provide an activation key, which you can find on the Canvas page for this assignment. This key is for your use in this course only. Do not share the key with anyone. If you already have Tableau installed on your machinefor example from a previous trialyou may use this key to reactivate it.
If you do not have access to a Mac or Windows machine, use the 14-day trial version of Tableau Online: 1. Visit https://www.tableau.com/trial/tableau-online
2. Enter your information (name, email, GT details, etc.)
3. You will then receive an email to access your Tableau Online site
4. Go to your Site and create a workbook
One final option, if neither of the above methods work, is to take advantage of Tableau for Students. Follow the link and select Get Tableau For Free. You should be able to receive an activation key which offers you a one-year use of Tableau Desktop at no cost by providing a valid Georgia Tech email. Note that it is unclear whether Tableau intends for these licenses to be renewable, so you may only be eligible to receive one in the event that you have never used a Tableau for Students license before.
Connecting to Data
Complete all parts of Q1b-c using a single Tableau workbook. (Technically, you could use multiple workbooks, but we do not recommend that here. The directions below assume you are using one workbook.)
You will need a data-world account (created using your preferred email) to access the data for Q1c. Q1 will require connecting Tableau to multiple data sources. You can connect multiple data sources within one workbook by following the directions here.
For data in Q1b: Open Tableau and when prompted to connect to a data source, choose To a File Text file. Select the data file (popular_board_game.csv) from the skeleton.
We recommend renaming the data connection since you will have multiple connections in this workbook. Rename the connection to something that makes sense to you. (Clicking on the text lets you edit it.)
For Q1b, you can use either a live connection or data extract. (You can read a comparison of Tableaus data connection options here.) Click the small square with a graph on the bottom bar next to Data Source to create a new worksheet. You now have the data needed for Q1b!
For data for Q1c: Add a new data source by clicking on Data Source.

7. When prompted to connect to a data source choose To a Server Web Data Connector. You may need to select More to see Web Data Connector as an option.
8. Enter this URL (with SQL query embedded) to connect to part of the data.world data set on board games. You may be prompted to log in to data-world and authorize Tableau. Do not edit the provided SQL query.
9. Click the small square with the graph on the bottom bar again to create another new worksheet, and Tableau will then automatically create a data extract. You now have the data needed for Q1c! (Live data connections are not an option when connecting to data-world. You can read a comparison of Tableaus data connection options here.)
If you are unable to connect to data-world for any reason, flat data files for Q1 have also been provided in the skeleton folder. The preferred data source is connecting online as that provides valuable experience (and something you may choose to use in your final projects). The provided csv files are identical to those hosted online and can be loaded directly into Tableau. That is, if data-world does not work for you, use the csv files.
b. [10 points] Grouped bar chart. You want to help this board game design company better understand the relationship between game playtime and game category among popular board games. Visualize popular_board_game.csv as a grouped bar chart. Your chart should display game category (e.g., fighting, economic) along the horizontal axis and game count along the vertical axis. Also show game playtime (e.g., <=30, (30, 60]) for each game category. Note: Do not differentiate between ‘support solo’ and ‘non-support solo’ for this question.The main goal here is for you to get familiarized with Tableau. Thus, we keep this part more open-ended, so you can practice making design decisions. We will accept most designs. We show one possible design in Figure 1a, based on the tutorial from Tableau, and you are not limited to the techniques presented there.Instructions:Design a vertical grouped bar chart. For each game category, show the game count for each game playtime.Include clearly labeled axes, a clear chart title, and a legend.In the bottom left corner of your image, include your GT username. In Tableau, this can be done by including a caption when exporting an image of a worksheet or by adding a text box to a dashboard. Refer to the tutorial here. Note: The default Tableau caption can be deleted or rewritten.Save the chart as grouped_barchart.pngTo save a worksheet image, go to Worksheet Export Image. To save a dashboard image, go to DashboardExport Image. Screenshots are not acceptable.Figure 1b: Example of a grouped bar chart. Your chart may appear different, and can earn full credit if it meets all the stated requirements. Your submitted image should include your GT username in the bottom left.c. [10 points] Stacked bar chart. After understanding the relationship between game category and their playtime, the game company now wants to know the count of games in different category, and if there is any relationship between game categories and how they are played (their playing mechanics). They also want to know how player size changes this information.A stacked bar chart is one way that can help understand this kind of information, where each bar represents a game category. A bars length represents the total game count in that category. For a bar, its sub bars show how games are divided into different game mechanics. (Optional reading: the effectiveness of stacked bar charts is often debatedsometimes, they can be confusing, difficult to understand, and may make data series comparisons challenging.)Instructions:1. Create a Worksheet with a stacked bar chart that shows game count for each games playingmechanics (sub-bars) for each game categoryThis data contains duplicate rows because each row represents a distinct game. Do not remove duplicate rows from the data when creating your chart.Display game counts along the vertical axis and category along the horizontal axisInclude clear axes labels, a clear chart title, and a legendCreate a dashboard using the sheet you created in the step 1Add a filter for number of Max.Players allowed in each game. Then update the chart using this filter to generate the following chart images (Refer to the tutorial here on how to add filter in a dashboard. Make sure to add Max.Players in the filter shelf in the Worksheet first, like this.):Select 2 Players only in the filter. Save the resulting chart as stacked_barchart_1.png Select 4 Players only in the filter. Save the resulting chart as stacked_barchart_2.png Both images should include your GT username in the bottom left. This can be added using a text box. Refer to the tutorial here. Note: Text boxes can only be added to a dashboard in Tableau, not a worksheet. To save a dashboard image, go to Dashboard – Export Image. Do not submit screenshots. Figure 1c: Example of a stacked bar chart after selecting 4 Players in Max.Players filter. Your chart may appear different, and can earn full credit if it meets all the stated requirements. Your submitted image should include your GT username in the bottom.Note: Your Tableau workbooks will not be graded. Your images should be clear and of high resolution. Important Points about Developing with D3 in Questions 25We highly recommend that you use the latest Chrome browser to complete this question. We will grade your work using Chrome v92 (or higher).You will work with version 5 of D3 in this homework. You must NOT CS: assignmentchef QQ: 1823890830 Email: [email protected]