1. Spreadsheet Data Management

2. Data management Index/Lookup functions Sorting Charts

3. Index function DayNames = Sheet[C2:C8] DayNumber = WEEKDAY(B2) Sheet[B3] = DayNames[DayNumber,1]

4. Index Demo

5. Match function

6. Match algorithm DayNames = Sheet[C2:C8]; for (each index I in DayNames) {if (DayNames[I] == Sheet[B3]) return I+1; } What is the average time to do this function? N = 50? N=50000?

7. Match Demo

8. Lookup Function

9. How much time? 5, 50, 50000

10. Lookup Demo

11. Sorting Ascending - smallest to largest item[I]<=item[I+1] Descending - largest to smallest item[I]>=item[I+1]

12. Sort Demo Simple sort buttons Sort menu item –Data -> Sort Ward list –Name, apartment, dates last month

13. Charts

14. Spreadsheets Spreadsheet is an array of values and expressions Reevaluate every expression for every change Number overflow/underflow Functions - name(arg1, arg2, arg3) Array functions - sum, average, count Data functions - match, vlookup Sorting Charts