Categorical affects Numeric

A categorical variable can affect a numeric variable by changing one of its properties - the mean value - depending on the value taken by the categorical variable.

The controls look like this:

Here, you can see that if the Light variable has the value Bright, then the Height mean value will have 700 added to it.

If the value is Dark, then no change will be applied and Height will have it's usual mean value of 5000.