Create datasets with functions.
There are different examples integrated, that you can select at right top.
At the example "circle" 99 values between -Pi and +Pi with the same distance are created.
This values are used to create the X- and Y-values..
Here 1 additional parameter (t1) is used. But there are also configurations with more parameters possible. Look at the exaple "9 circles", that is a modifikation of the example above.