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Teasing apart multi-scale interactions

In the previous exercise, you fit the following model:

tensor_mod <- gam(cadmium ~ te(x, y, elev), 
                  data = meuse, method = "REML")

In this exercise, you will fit a model with smooths and tensor interactions to separate out the independent and interacting effects of variables.

This exercise is part of the course

Nonlinear Modeling with Generalized Additive Models (GAMs) in R

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Exercise instructions

  • Convert the above model such that x and y interact on the same scale, the effect elev is a separate smooth, and the interaction of all three on different scales is a separate term.
  • Summarize and plot the model.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Fit the model
tensor_mod2 <- ___


# Summarize and plot
___
___(___, pages = 1)
Edit and Run Code