OpenOffice.org OpenOffice - 3.3 Guía básica descargar pdf (Pagina 92)

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Figure 86: Examples of donut charts

Area charts

An area chart is a version of a line or column graph. It may be useful where you wish

to emphasize volume of change. Area charts have a greater visual impact than a line

chart, but the data you use will make a difference.

Figure 87: Area charts—the good, the bad, and the ugly

As shown in Figure 87, an area chart is sometimes tricky to use. This may be one

good reason to use transparency values in an area chart. After setting up the basic

chart using the Chart Wizard, do the following:

• Right-click on the y-axis and choose Delete Major Grid. As the data overlaps,

some of it is is lost behind the first data series. This is not what you want. A

better solution is shown in the highlighted chart below and is explained in the

next point.

• After deselecting the y-axis grid, right-click on each data series in turn and

choose Format Data Series. On the Transparency tab, set Transparency to

50%. The transparency makes it easy to see the data hidden behind the first

data series. Now, right-click on the x-axis and choose Format Axis. On the

Label tab, choose Tile in the Order section and set the Text orientation to 55

degrees. This places the long labels at an angle.

• To create the third variation, after doing the steps above, right-click and

choose Chart Type. Choose the 3D Look option and select Realistic from the

drop-down list. We also twisted the chart area around and gave the chart wall

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