Presenting Work: Graphics and Charts

1
Presenting Work Graphics and Charts

• Letts Chapter 14

2
Computer Graphics

• Computer graphics refers to any pictures or
  graphs produced using a computer.

3
Drawing and Design Packages

• Drawing and design packages include packages for
• freehand drawing and painting
• image manipulation
• 3-D modelling
• animation.

4
Picture Storage

• Storage of pictures can be
• pixel based (bit-mapped) - a picture stored as a
  set of dots
• object based (vector or line) - each picture is
  stored as a set of shapes.

5
Paint Packages

• A paint package is a general term for any
  program which allows freehand drawing and
  colouring.

6
Computer Aided Design

• A computer aided design (CAD) system allows the
  user to produce accurate drawings.
• Hardware for CAD usually includes
• a microcomputer with a large hard disk and main
  store
• a graphics tablet with a stylus
• a high resolution monitor
• a plotter or at least a laser printer

7
CAD and CAM

• CAM is computer aided manufacture.
• CAD/CAM is a CAD system integrated with a CAM
  system.

8
Graphs and Charts

• Graphs and charts are often referred to as
  business graphics.
• Types of graph include
• a bar chart, made up of rectangular blocks or
  bars
• a pie chart, in the form of a circle with lines
  drawn out from the centre
• a line graph, which has a set of points joined by
  a line
• a scatter graph, produced when two different
  quantities are plotted against one another.

9

• These types of graphs are used as follows
• bar chart - to show the relative sizes of
  separate values
• pie chart - to show how something is shared
• line graph - to show how a quantity is changing
• scatter graph - to show how different quantities
  are related