Specifying trend line settings for charts
Trend lines are horizontal or vertical lines that help users interpret the data in relationship to a predetermined value. For example, a trend line can indicate the target values.
When using the [Specify Chart Settings] dialog box to create and configure charts, these settings are made on the [Trend Lines] tab. This tab contains a grid in which you make the specifications for each trend line you want to include on the chart.
When modifying a chart by script, use the TrendLine scripting class to make trend line settings.
This table lists the settings you can make on the [Trend Lines] tab. Attribute names for the TrendLine property are also listed.
Trend Line tab Column / Option | Attribute name | Description / Comments |
---|---|---|
Start Value
End Values |
StartValue
EndValue |
To define a
flat trend line, specify just a starting value.
To define a slanted trend line, specify both the starting and ending values. If the value you specify is not within the chart limits, the trend line or zone is not included. |
Display Value | DisplayValue | Specify the label, if any, for the trend line. |
Color | Color | Specify the RGB
value for the trend line color, as a hexadecimal value (000000-FFFFFF).
You can double-click to display the [Color] dialog box, where you can select a color or define a custom color for the trend line. The hexadecimal code displays after you click [ ] to exit the [Color] dialog box. |
Trend Zone | IsTrendZone | To mark a trend zone (range of values) instead of a line, select this option. |
Show On Top | ShowOnTop | To display the trend line or zone on top of the chart values, select this option. |
Thickness | Thickness | Specify the thickness of the line, in pixels. |
Alpha | Alpha | Specify the transparency of the trend line, from 0 (transparent) to 100 (opaque). |
Dashed | Dashed | To use a dashed line for the trend line, select this option. |
Dash Length
Dash Gap |
DashLen
DashGap |
Specify the
length of the dash and the gap between dashes, in pixels.
These values are only applicable if you have selected the [Dashed] option. |
Value on Right | ValueOnRight | To show the trend line label to the right of the chart, select this option. Otherwise, the label displays to the left of the chart. |
Tool Text | ToolText | Specify the text, if any, that displays as a tip when the pointer hovers over the line. |
For more information about these and other chart properties, see the FusionCharts Developer help (www.fusioncharts.com/dev/).