In order to change the scales to display different minimum/maximum values, proceed as follows:
To modify the scale maximum:
If neither the scale minimum or maximum is locked (see below), then perform the following. Firstly, perform an upward dragging (left-button down) movement on the scale. The initial upward movement indicates that the bottom of the scale is to be kept fixed. Now carry out a sequence of downward or upward (as appropriate) dragging (left-button down) movements on the control scale until the desired scale maximum value is achieved.
If the scale minimum is locked, then it will be unaffected by any mouse movements, and any upward or downward dragging movements will apply only to the scale maximum, so these can be applied until the required value is achieved.
If the scale maximum is locked, it is not possible to change its value. (See below for details on how to unlock it).
To modify the scale minimum:
if neither the scale minimum or maximum are locked (see below), then: Firstly, perform a downward dragging (left-button down) movement on the scale. The initial downward movement indicates that the top of the scale is to be kept fixed. Now carry out a sequence of downward or upward (as appropriate) dragging (still holding left-button down) movements on the control scale until the desired scale minimum value is achieved.
If the scale maximum is locked, then it will be unaffected by any mouse movements, and any upward or downward dragging movements will apply only to the scale minimum, so these can be applied until the required value is achieved.
If the scale minimum is locked, it is not possible to change its value. (See below for details on how to unlock it).
To translate a scale: perform a right-click drag in whichever direction is appropriate.
Note: if either or both scale minimum or maximum is locked, it is not possible to translate the scale.
A special dialog facility exists to configure scales. Simply right-click on the relevant scale; this will bring up the following pop-up menu:
The various options have the following meanings:
Option |
Meaning |
Add a Slider |
Create a new scale. |
Set Title |
Change the name of scale. |
Lock max |
Do not allow the scale to extend upwards (vertical scales) or rightwards (horizontal scales) beyond the specified value. |
Lock min |
Do not allow the scale to extend downwards (vertical scales) or leftwards (horizontal scales) beyond the specified value. |
Set Maximum |
Define the maximum value for the scale. |
Set Minimum |
Define the minimum value for the scale. |
Remove Slider |
Delete scale from graph area. |
Snap to Associated Graphs |
Automatically adjust the selected horizontal/vertical scales so that all statistical models are displayable within the graph area. |
Note that where relevant the current name for the scale will be appended in brackets to an option e.g.'Set Title (Vertical 1)' indicates that the current scale being referenced is 'Vertical 1'.
To add a new vertical scale to the Graph Area, simply right-click on any existing vertical scale; this will bring up the pop-up menu (as previously):
Now select the 'Add a Slider' option. A new vertical scale will be added adjacent, and immediately to the right of, the existing set of vertical scales. To add a new horizontal scale to the Graph Area, simply right-click on any existing horizontal scale, then, from the resultant pop-up menu, select the 'Add a Slider' option. A new horizontal scale will be added immediately below the existing set of horizontal scales.
In the Statistical Summaries view you can specify which scale (Vertical 1, Vertical 2, Vertical 3, etc.) graphs can be displayed against.
In the example below, two additional vertical scales (Vertical 2, Vertical 3) have been added:
We saw earlier that the 'Snap to Associated Graphs' option available on the special pop-up menu to configure scales:
results in automatic adjustment of the selected horizontal/vertical scales so that all included statistical models are displayable within the graph area. Essentially what happens is that, for horizontal scales, the scale minimum is set to the minimum from the set of included statistical models, and likewise for the scale maximum. Similarly, for vertical scales, the scale minimum is set to the minimum from the set of included statistical models, and likewise for the scale maximum. Note that displaying extremely disparate statistical models (for example, models which are considerably apart chronologically) may result in severe compression leading to a very distorted view of the graph area.
For each graph displayed in the graph area, there is a corresponding indicator in the associated vertical scale (see example on right). Indicators are vertical bars which are colored the same as the associated graph.
At runtime, the indicator displays the value corresponding to that in force at the rightmost edge of the graph area (typically the most recent data). For historical data, left-clicking on a horizontal time scale results in a vertical black line to be drawn directly above that point in the graph area; this line defines the data point to determine the observed values that the indicators will display.
If a graph is de-selected, then its corresponding indicator will disappear. |
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(C) Copyright IBM Corporation 2000, 2006.