5.10.7 Fixed Samples

Fixed samples are special graphs. They are used to mark important points in time to facilitate the orientation in a graph, e.g. you could use two fixed samples to mark the beginning and the end of the time period which should be investigated or one fixed sample to mark an important event. Record filters do not influence fixed samples.

Fixed samples can be added in two ways:

  • to an existing graph

  • as own graph with its own node in the Functions tree, independently from any “normal” graphs

If fixed samples are added to an existing graph and the existing graph is deactivated or deleted the fixed samples are also deactivated or deleted. To add a fixed sample to an existing graph, select the appropriate graph in the Functions tree, right-click to open its context menu and press the Edit... button. This will open the Graph dialog shown in figure Graph dialog. More information about this dialog can be found in Graph Properties, table Graph dialog properties.

Graph dialog
Graph dialog

Press the Select button next to the Fixed samples field to open the Fixed Samples overview shown in figure Fixed samples dialog. When you press the Add button in the Fixed Samples overview the Add Fixed Sample dialog is opened (see figure Add Fixed Sample dialog).

Add Fixed Sample dialog
Add Fixed Sample dialog

In order to add a fixed sample as own graph, the command Add fixed sample... from the Edit menu must be used. This will directly open the Add Fixed Sample dialog. When you add a fixed sample as own graph a Fixed Samples category node (if it does not already exist) and a Fixed Sample node are added to the Functions tree.

If you add a fixed sample (both ways) you have to provide a timestamp and a timeline index. The graphical element representing the fixed sample is created at the specified timestamp at the specified timeline index in the Graph window

Fixed samples dialog
Fixed samples dialog

In order to see a list of all fixed samples go to the Functions tree, right click on a “normal” graph or a fixed sample graph and select Edit... The Graph dialog shown in figure Graph dialog will be opened. The Fixed samples field displays the number of fixed samples that were already created. Use the Timeline index drop down list to specify the timeline that should be used for these fixed samples. Press the Select... button next to the Fixed samples field to open the Fixed samples dialog (see figure Fixed samples dialog). The Fixed samples dialog provides an overview of the existing fixed samples. In this dialog you can also add, edit or remove the selected fixed sample or remove all fixed samples (Clear button). When you press the Add or Edit button the Add Fixed Sample dialog is opened. The Value column displays the index of the timeline that is used for displaying the fixed samples.