hello !
Linear parallel coordinates are used for multidimensional data. Each element has a specific value on each individual dimension.
Radial parallel coordinates are similar to linear parallel coordinates. Here, the dots representing values are linked together to form a shape. Usually it shows multiple records of data.
Star plots are similar to radial parallel coordinates but they only have a single record of data rather than multiple.
These charts do not require calculation when put together. Dimensions are more important to categorize here.
Values are translated into position and orientation, which form shapes when connected.
Good examples:
Less good examples: