Ranking Senators w/ Ted Kennedy s Votes

Transcription

1 Ranking Senators w/ Ted Kennedy s Votes Feb 7, 2012 CS Intro. to Comp. for the Humanities and Social Sciences 1

2 Last Class Define Problem Find Data Use Ted Kennedy s votes to compare how liberal other senators are Votes on Bills Only Write a set of instructions Solution Computer (Excel) XML Format CSV Format Make HUGE Excel Table CS Intro. to Comp. for the Humanities and Social Sciences 2

3 Last Class Find out what CSV is XML Format CSV Format Make HUGE Excel Table Use a terminal Run a Java program Import the data we want into Excel Find a problem with the program Figure out a solution Format the table to get what we want CS Intro. to Comp. for the Humanities and Social Sciences 3

4 Today Define Problem Find Data Use Ted Kennedy s votes to compare how liberal other senators are Votes on Bills Only Write a set of instructions Solution Computer (Excel) XML Format CSV Format Make HUGE Excel Table CS Intro. to Comp. for the Humanities and Social Sciences 4

5 Excel: Ctrl is your friend Bottommost Cell: Ctrl and Topmost Cell: Ctrl and Rightmost Cell: Ctrl and Leftmost Cell: Ctrl and Pressing Ctrl selects each cell you click Shift is your friend too: Pressing Shift selects all cells between clicks. CS Intro. to Comp. for the Humanities and Social Sciences 5

6 Last Class: Completed Task Open the spreadsheet from last class. 2. You should have 4,801 rows (Task 3.7) 3. You should have columns through E. CS Intro. to Comp. for the Humanities and Social Sciences 6

7 Task 3.8 We want a unique identifier for the vote of each bill in this congress. Which two columns together make a unique key? CS Intro. to Comp. for the Humanities and Social Sciences 7

8 Task 3.9 Add another column to the table by entering a vote_id column in cell F1. Write a formula to output session:vote_number values for this row. Use fill down or copy/paste, if necessary, to apply this formula to all the other rows. CS Intro. to Comp. for the Humanities and Social Sciences 8

9 Task 3.9 Add a vote_id column in cell F1. Write a formula to output session:vote_number values for this row. Use fill down or copy/paste, if necessary, to apply this formula to all the other rows. CS Intro. to Comp. for the Humanities and Social Sciences 9

10 Task 3.10 Add a numerical_vote column in cell G1. Write a formula to output: 0 if the senator did not vote 1 if the senator voted Nay 2 if the senator voted Yea Error otherwise CS Intro. to Comp. for the Humanities and Social Sciences 10

11 Decision Trees: Graph Representation vote_cast = Not Voting True False 0 vote_cast = Nay 0 if the senator did not vote 1 if the senator voted Nay 2 if the senator voted Yea Error otherwise True False 1 vote_cast = Yea True False 2 Error CS Intro. to Comp. for the Humanities and Social Sciences 11

12 Open Last Class s Activity (1-1) Do Task 4 (Make a Pivot Table) Make sure you save! CS Intro. to Comp. for the Humanities and Social Sciences 12

13 You have done these things Find out what CSV is XML Format CSV Format Make HUGE Excel Table Use a terminal Run a Java program Import the data we want into Excel Find a problem with the program Figure out a solution Format the table to get what we want CS Intro. to Comp. for the Humanities and Social Sciences 13

14 Break CS Intro. to Comp. for the Humanities and Social Sciences 14

15 Break Index Cards (at end of class) Name Class Year Concentration Where You re From Something Interesting About Yourself Self Portrait CS Intro. to Comp. for the Humanities and Social Sciences 15

16 See anything odd in the pivot table? Use the web to find out what happened CS Intro. to Comp. for the Humanities and Social Sciences 16

17 See anything odd in the pivot table? Use the web to find out what happened Use Home Conditional Formatting to color all blank cells red CS Intro. to Comp. for the Humanities and Social Sciences 17

18 See anything odd in the pivot table? Use the web to find out what happened Use Home Conditional Formatting to color all blank cells red Name Sheet1 RawData Name Sheet2 PivotTable Make column widths nice: Home-> Cells-> Format->AutoFit Column Width CS Intro. to Comp. for the Humanities and Social Sciences 18

19 Activity 1-2 Do Task 1 CS Intro. to Comp. for the Humanities and Social Sciences 19

20 Activity 1-2 Do Task 1 What happened to Corzine and Mendenez? How do we fix it? CS Intro. to Comp. for the Humanities and Social Sciences 20

21 Activity 1-2 Do Task 2 CS Intro. to Comp. for the Humanities and Social Sciences 21

22 Next Class Redefine Problem Find Data Use Senator X s votes to compare how liberal other senators are Votes on Bills Only Write a set of instructions Solution Computer (Excel) XML Format CSV Format Make HUGE Excel Table CS Intro. to Comp. for the Humanities and Social Sciences 22

23 If we have time... Click on the Book URL link on the class website CS Intro. to Comp. for the Humanities and Social Sciences 23

24 Last Things HW1-2 posted (due next Tues) Fixed JAR file posted TA and Staff hours are posted CS Intro. to Comp. for the Humanities and Social Sciences 24

25 Index Cards Name Class Year Concentration Where You re From Something Interesting About Yourself Self Portrait CS Intro. to Comp. for the Humanities and Social Sciences 25