HP Storage Essentials Storage Resource Management Report Optimizer Software 6.0 Performing On-Report Analysis with Web Intelligence (August 2008)

Formatting charts150
Displaying a linear or logarithmic scale for the Y-Axis
By default, Web Intelligence displays the Y-Axis on charts as a linear scale. You can set
the axis to a logarithmic scale. Logarithmic scales allow you to examine values that span
many orders of magnitude without losing information on the smaller scales.
Linear scales
In a linear scale, the axis markers are evenly spaced. Linear scales are based on addition.
Consider, for example, the linear sequence:
1, 3, 5, 7, 9
To get the next number in the sequence, you add 2 to the previous number.
Logarithmic scales
Logarithmic scales are based on multiplication rather than addition. In a logarithmic scale,
the steps increase or decrease in size. Logarithmic scales are based on multiplication (or
division). Consider, for example, the logarithmic sequence:
2, 4, 8, 16, 32
To get the next number in the sequence, you multiply the previous number by 2. We can
say that this sequence represents ``base 2.''
Consider the following sequence:
1, 10, 100, 1000, 10000
This sequence represents ``base 10,'' because you get the next term in the sequence by
multiplying the previous term by 10.
To change a Y-Axis scale to logarithmic or linear
1. Right-click the chart you want to modify.
2. Select Format > Chart.
The Format Chart dialog box appears.
3. Click the
Appearance tab, and then click Values on the Y-Axis area of the preview
pane on the left.
The options available for the Y-Axis appear.
4. To display the Y-Axis as a logarithmic scale, select Logarithmic scale.