MARS tuning number of terms

Machine Learning and Modeling
1

Hi,

In the earth package in R, the tuning paramters are described as the maximum degree of interactions and the number of terms retained in the final model.. Just to clarify for myself:

Is the number of terms the same thing as the number of knots to retain?

Thanks

2

The terms in MARS are single knot splines (basically ReLU before that was a thing). So each term is associated with a knot. The number of knots per variable varies based on the data since the algorithm can select the same variable multiple times.

3

Thanks @Max your help. I thought this might be the case but wanted to be doubly sure

4

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