2.  Repetitive calculations › Frequency › Complexity › Different views  Analysis of data › Explorative › Manipulation

3. cell (letter-number) Column (letters) Row (numbers) workbook = collection of worksheets

5.  Label – identification for people  Constant – any format › Text, number, picture, hyperlink, … › Value for computer › Format for people  Formula – uses cells & constants › Always begins with = › “takes the value of”

7.  =cell  Why do you use it?  Fundamental Principle: › Never have to change anything in two places › Variant of DRY (Don’t Repeat Yourself)  Copy-paste › Fine if you really want a snapshot › Does not work if data will change

8.  Once you define the formula › Can change the values as often as you like › Automatically re-computes  Treats cells as variables › Defined by location, not value › Each cell constant or another formula  Example › Pay = hourly rate * hours worked  Values can change  Formula remains the same

9.  Want the same information for different data › Example: min, max, avg grades for each assignment  Can use copy or fill  Copying a formula moves it relatively

10.  Bottom right corner › One cell copies  Value exact  Formula changes cells › Multiple cells extrapolate

11.  Absolute positioning › Can lock the cell, column or row  Cell: $A$1  Column: $A1  Row: A$1 › To change a reference to absolute  Insert $  PC: Use F4  Mac: Cmd-T

12.  Can simply click on a cell on another sheet › Check the results; easy to get the wrong cell as you navigate between sheets.  Reference it using SheetName!cell

14.  Use constants when they will not change  Values that won’t change: › Computing the area of a circle  Π r 2 › Computing the area of a triangle  ½ base*height  What about… › Minutes in an hour? › Days in the year?

15.  Use directly in formulas Or  Place in cells › Used frequently › Precision: make sure it’s right!

17. Name Box  Named elements are fixed locations

18.  Can use to name or manage names  Accessing: › PC Formulas -> Define Name › Mac Insert -> Name -> Define

21.  Paste specials › Values › Transpose › With and without formatting  ESC: This key is your friend  Changing cell sizes  Deletions and additions

22.  Name spreadsheets (rename)  Delete unused spreadsheets  Separate input, computation, and output › Input: only page that you change › Output: readability › Computation: everything else