Working with Datasets
Datasets are collections of plotted data points that can be extrapolated into an equation based on the piecewise linear makeup of the plot. Each plot consists of straight line segments whose vertices represent their end points. A curve is fitted to the segments of the plot and an expression is derived from the curve that best fits the segmented plot. The created expression is then used in piecewise linear Intrinsic Functions. You can add datasets at either the project level or the design level. They can be for various purposes, including to define frequency-dependent port impedances or frequency-dependent global variables.
Project-level datasets are typically used for defining material properties at the project level (applicable to all designs in the project).
Design-level datasets can be used in geometry entities like part commands, coordinate systems, points, and planes. Design-level datasets do not work with equation-based surfaces or curves. Design-level datasets can be used directly with piecewise linear functions in expressions or indirectly through variables that can refer to the dataset.
Design-level datasets can also be used in the following operations:
- Creating or editing geometry – when a geometry uses a dataset directly, edit dataset invalidates the solution. When a geometry uses a variable that is defined by dataset, editing the dataset does not invalidate the solution.
- Creating an Animation – based on a variable which can index in datasets.
- Copying and Pasting Geometry – if a part refers to a design dataset, it will be pasted to destination design.
Datasets are provided
for
The Datasets dialog box provides a browsable listing of all datasets currently defined for the project or design. A preview window displays a plot of the currently selected dataset. Controls allow you to Add, Edit, Remove, and Clone datasets; to Import and Export characteristic data; and to launch the SheetScan tool to extract data from graphics such as data sheets.
To access the Datasets window:
- For project-level datasets, including 3D datasets, click Project > Datasets.
- For design-level datasets, click