OpenOffice.org OpenOffice - 3.2 Guide de base télécharger pdf (Page 96)

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• The second chart is the 3D option in the chart wizard with a

simple border and the 3D chart area twisted around.

• The third chart is an attempt to get rid of the legend and put

labels showing the names of the companies on the axis instead.

We also changed the colors to a hatch pattern.

Pie charts

Pie charts are excellent when you need to compare proportions. For

example, comparisons of departmental spending: what the department

spent on different items or what different departments spent. They

work best with smaller numbers of values, about half a dozen; more

than this and the visual impact begins to fade.

As the Chart Wizard guesses the series that you wish to include in your

pie chart, you might need to adjust this initially on the Wizard’s Data

Ranges page if you know you want a pie chart, or by using the Format

> Data Ranges > Data Series dialog.

You can do some interesting things with a pie chart, especially if you

make it into a 3D chart. It can then be tilted, given shadows, and

generally turned into a work of art. Just don’t clutter it so much that

your message is lost, and be careful that tilting does not distort the

relatively size of the segments.

You can choose in the Chart Wizard to explode the pie chart, but this is

an all or nothing option. If your aim is to accentuate one piece of the

pie, you can separate out one piece by carefully highlighting it after

you have finished with the Chart Wizard, and dragging it out of the

group. When you do this you might need to enlarge the chart area

again to regain the original size of the pieces.

Figure 72: Pie charts

The effects achieved in Figure 72 are explained below:

• 2D pie chart with one part of the pie exploded: Choose Insert >

Legend and deselect the Display legend box. Choose Insert >

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