GPP Spreadsheets
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GPP Spreadsheets Presentation Transcript

  • 1. General Purpose Packages Spreadsheets
  • 2. What is a Spreadsheet?
    • Spreadsheets are used mainly for recording mathematical data such as bank records, accounts, bills, scientific records etc.
    • Spreadsheets carry out calculations based on the numbers and formula entered in them.
  • 3. Spreadsheet Structure
    • A spreadsheet basically consists of an electronic table or grid, made up of cells .
    • Each cell is named from the column and row which it occupies.
  • 4. Cells, Columns and Rows
    • Cells are arranged in rows and columns .
    • The rows are referenced by numbers and the columns by letters.
    Column Row Cell
  • 5. Values, Text, and Formulae.
    • A cell can contain one of three types of information
      • A value (number)
      • Text
      • or a formula
    • Cells containing formulae allow us to perform calculations using data stored in other cells.
  • 6. Formulas
    • There are four basic calculations that can be performed in spreadsheets. These are:
      • Addition ( + )
      • Subtraction ( - )
      • Multiplication ( * )
      • Division ( / )
    • Formulae always start with the equals sign (=) to show that the content in the cell is equal to the formula it calculates
  • 7. Formulas
    • Simple Formulas
    • An example of a simple formula:
      • = A3+B9
    • Complex Formulas
    • An example of a Complex formula:
      • = ((A9*100)-(B9*50)+(H12*H12))/G7
    • Basically Complex means harder
  • 8. Formatting
    • As with word processing you can change the way your spreadsheet looks. This is called altering the cell format
    • You can alter:
      • The Column width
      • The Row height
      • The Cell Alignment (left, right or centred)
    Centre Aligned Cell
      • Right Aligned Cell
    Left Aligned Cell
  • 9. Cell Attributes
    • When you set up the attributes you are defining the format of the properties in that cell
  • 10. Other Features
    • Cell Protection
      • Allows you to ‘lock’ cells so they can not be changed.
    • Insert Row & Column
      • Allows you to add a new row or column.
      • If you are inserting them between two columns or rows then it will move the information in them over to the next row
    • Replication
      • Simply means copying
      • Good for copying formulas from one cell to another
      • An example of this is the ‘fill down’ command
  • 11. General Purpose Packages Spreadsheets
  • 12. Calculation
    • Automatic Calculation
      • If you change the value in a cell any other cells that affect that value will be changed automatically
    • Manual Calculation
      • Automatic Calculation can be turned off so that other cells can only be updated when you tell it to.
  • 13. Charting
    • Values and figures can be uninteresting and sometimes difficult to see trends.
    • Most spreadsheet packages allow the user to create charts based on these figures.
    • These can make presentations.
    • interesting and colourful
  • 14.  
  • 15. Fully Labelled Charting
  • 16. Functions
    • Predefined formulas that perform calculations, e.g.
      • SUM, AVERAGE, MAXIMUM, MINIMUM & IF
    • These calculate from a range of cells using the : symbol
    • SUM(A2:A10) will add
    • up the numbers in cells
    • A2 to A10.
  • 17. Functions
    • The IF function is used to make a decision depending on the values given.
    • For example this formula is in cell A10:
      • =IF(D5>50, ‘You Win’,’You Lose’)
    • Meaning:
      • If the value of cell D5 is greater than 50, then place ‘You Win’ in A10, otherwise place ‘You Lose’ in A10
  • 18. Referencing
    • A relative reference will change when the formula it is in is replicated to other cells.
    • An absolute reference will not change when a formula is replicated.
    • Absolute cell references are very useful for referring to specific cells in a spreadsheet
    • The $ symbol is used to ‘keep’ the formula relating to a particular cell.
      • =C5*$B$2
      • =C6*$B$2…
  • 19. General Purpose Packages Spreadsheets