1. Tutorial: Crime & Violence Data Cubes at NCOVR Data Center Last Update:September 12, 2005 by:Jacqueline Cohen

2. Summary Slide (Click below to move to a section) Access to NCOVR Data Cubes Access to NCOVR Data Cubes Cube Resources Cube Elements Manipulate Rows & Columns Manipulate Rows & Columns Add/Delete Rows & Columns Add/Delete Rows & Columns Charts Split View of Chart & Table Split View of Chart & Table Save/Export Results Save Cube Query User Designed Custom Queries User Designed Custom Queries Query Design – Individual Records Query Design – Individual Records Query Design – Summary Data Query Design – Summary Data Save/Export Custom Queries Save/Export Custom Queries

3. NCOVR Web Access: http://www.ncovr.org/ 1. Access Data Center from NCOVR Web Site 2. Open Data Access Page

4. Data Access Page User Resources New Users—Register for Free Personal Account

5. Data Access Page User Resources Open Data List & Codebooks Description of Data Access Tools Data Set Description Go to Selected Data Cube

6. COGNOS Login Window Registered Users Receive Personal Directory to Save & Share Data Tables

7. Available Cube Resources

8. Help Resources (from “Data Cubes and Reports”) Codebooks On-Line Tutorials

9. Access Data Cubes (from “Data Cubes and Reports”) Current Collection of Public Access Data: NCVS, NIBRS, UCR, US Census

10. Search Cube Contents Select Search Tab and Enter Keywords Search Results — Click to Open

11. Elements of Cube Window Toolbar Dimension Bar Dimension Viewer

12. Dimensions & Measures Click to view other dimensions in bar Dimensions:Attributes that describe cases in data Dimensions: Attributes that describe cases in data (row & column heads; filter conditions) (row & column heads; filter conditions) Measures:Counts, Percents, other Quantities Measures: Counts, Percents, other Quantities summarize cases ( displayed inside table cells) summarize cases ( displayed inside table cells)

13. Expand Dimensions Click + sign OR Click > arrow

14. Manipulate Rows or Columns in Table Right click on row bar (above row labels) to: * Expand, delete, swap dimensions * Substitute up or down levels in hierarchy Row Bar

15. Filter Data Using Dimensions Left click on item to filter data to desired attribute Right click item, then Filter Right click item, then select Filter OR After expand dimension to desired level:

16. Expand Table Dimensions Right click in column bar Click on Down a Level Result: Expands Crime Types

17. Manipulate Rows or Columns in Dimension Viewer Replace rows or columns dimension Filter data to selected dimension value Nest new dimension under current row or column dimension Find specific dimension value in rows or columns Right click item in dimension viewer

18. Calculations & Hide/Show Right click in row or column header box Left click to insert calculation or hide/show rows or columns

19. Calculate Rates Select operator Name calculation Select dimensions Right click in column header box Click “Insert calculation”

20. Hide/Show Dimensions Right click in column header box Click “Hide/Show Select items to hide (show) Use arrows to move between hidden & visible

21. Swap Rows & Columns Click to Swap Rows & Columns

22. Chart Data Available Chart Styles Chart Button on Toolbar

23. Chart Display Options Change axes scale Show grid lines Show markers Options button on toolbar

24. Chart Display Options Fit chart to screen Options Button on toolbar

25. Results: Chart Fit to 100% Screen Measure in Chart = Rate

26. Split View of Chart & Table 1. Options Button 2. Split View

27. Show Table Crosstab—Row-by-Column Table OR Indented Rows Crosstab Format

28. Export Summary Data Export summary table to CSV file for use in other applications Toolbar at bottom of cube window

29. Use Data CODES, Not Labels 1. OPTIONS icon in Toolbar at bottom of cube window 2. Open OPTIONS Menu from CROSSTAB (Table) view > Select “Options” 3. Click to turn ON “Short Names”

30. Save Query for Future Use Registered users can save query Saves current table format and calculations for future use Automatically includes results from data updates “Save As” Icon

31. Destination for Save Queries User supplies name and description User supplies destination in personal “Newsbox”

32. Sharing Queries with Others: Registered Users Only Select Properties in user’s NewBox Select Security Tab Designate Users

33. Drill Through to Retrieve Original Record Data Toolbar at bottom of cube window Drill through summary table to query underlying record data

34. Drill Through to Retrieve Original Record Data Drill-through returns original coded values of all variables Drill-through toolbar at bottom of cube window

35. Web Access to Codebooks Web link opens codebook list UCR Offenses

36. UCR Offenses Variable Codes Query data to include monthly reports only if agency in city with population > 100,000 Relevant Codes from Codebook: Actual offenses:ID_Card = 1 ● ● ● City Population > 100,000: ID_Group < 2

37. Toolbar in Drill-Through Window Create Crosstab Create Chart Filter Data Design Data Export Data

38. Modify Columns in Design Data to Restrict Variables Design Button in Drill- Through Add Columns or Calculations Delete columns

39. Add Calculation to Query HINT: Add calculations before add or delete columns Click items to include in calculation

40. Add Columns to Query Left click to add items to query Left click to highlight; then X to delete items from query

41. Filter Records in Design Data  Select Filter to restrict contents of data  Select Filter variable  Create filter conditions Active Filters Click to Add Filter

42. Query Results: Monthly Records Each Police Agency (ORI) with Pop > 100K Data in List Format: Distinct monthly record for each unit of observation

43. Summarize Functions in Design Data  Count records  Sum values  Average values  Minimum value  Maximum value Design Data Summarize

44. Add Columns in List or Crosstab Format Point & Click to select variables and destination

45. Query Results: Yearly Gun Crimes per ORI with Population > 100K Longitudinal data of annual measures for each unit of observation compiled from monthly data

46. Save and Export Query Results Save query designExport query records Toolbar Drill-Through Toolbar