Range Scheme

Range schemes link values in a table column with line, fill, symbol, and font properties. Each item in a range scheme has different properties that are displayed in the bar or classed post log for the range of values in the scheme item. This is useful when grouping data by setting unique properties for each range of data. Range schemes are optional with bar and classed post logs.

As an example, a data set contains values from zero to 100. The data can be grouped into any number of divisions. If you use four divisions the ranges can show different properties for values between zero and 25, 25 and 50, 50 and 75, and 75 and 100. With a bar log, you could show different fill patterns for each of the ranges. With a classed post log, you could show different symbols and colors for each of the ranges.

Creating a Range Scheme

To create a range scheme based on existing data in the project:

Click the Home | Display | Scheme Editor command or click the button.
In the Scheme Editor, click the button to open the New Scheme dialog.
In the New Scheme dialog, select Base Scheme on Column Data, which allows you to determine the source column of data on which to base the scheme.
Click the box next to Table Name and select the table that contains the scheme information from the list.
Click the box next to Column Name and select the column that contains the scheme information from the list.
Type a Scheme Name.
Select Range as the Scheme Type, if it is not already selected.
The Interval Count is set to 10 by default. Highlight the 10 and type a new value or click the buttons to increase or decrease the number of intervals. The total range of values is evenly split by the number of intervals initially.
Click OK to close the New Scheme dialog.
In the Scheme Editor, click on the next to Range.
Click on the desired scheme name.
Click on the next to the scheme name in the Range list.
Select each scheme item and edit the properties on the right side of the dialog.
Click OK to exit the Scheme Editor and save the properties of the new scheme.

Editing a Range Scheme

To edit a range scheme:

Click the Home | Display | Scheme Editor command or click the button.
In the Scheme Editor, click on the next to Range.
Click on the desired scheme name.
To change the scheme name, on the right side of the dialog, type a new name next to Name and press ENTER on the keyboard. The scheme name is updated.
To change a scheme item range of values,
1. Open the scheme by clicking the next to the scheme name.
2. Click a scheme item name.
3. On the right side of the dialog, click the next to Range Properties, if necessary.
4. Type a new minimum value next to Lower Range Value and press ENTER on the keyboard. The scheme item name is updated.
5. Type a new maximum value next to Upper Range Value and press ENTER on the keyboard. The scheme item name is updated.
6. Data greater than or equal to the Lower Range Value and less than the Upper Range Value are included in the bin for a range. The last bin includes data greater than or equal to the Lower Range Value and less than or equal to the Upper Range Value in the bin.
To change scheme item properties,
1. Open the scheme by clicking the next to the scheme name.
2. Click a scheme item name.
3. On the right side of the dialog, edit the line, fill, symbol or font properties.
Click OK to exit the Scheme Editor and save the properties of the scheme.

Data Requirements

Range schemes require a numeric column in the table to create the log. Text cannot be used for a range scheme.

Reusing Range Schemes

A range scheme can be reused. Once a range scheme is defined you can use it with multiple data tables in multiple projects.

To reuse a range scheme, click on any bar or classed post log. The properties are displayed in the Property Manager. Check the box next to the Use Range Scheme option and set the Data Column and Range Scheme to the appropriate column and scheme.