R help - May 2020 - How to write the segmented equation from MARS coefficients

Hello

I created a MARS model from earth package.for one predictor EngDispl vs FE.
These are the resulting coefficients:

 summary(marsFit)$coefficients
                        y
(Intercept)     18.049001
h(EngDispl-4.3) -4.378082
h(4.3-EngDispl) 10.925240
h(EngDispl-2.3)  5.942387
h(EngDispl-3.5) -2.552332

I am at a loss at writing the equation linking the dependent and
independent variables for such an output.
What is h? Is it a function / operator?

Thank you for your help

Yousri fanous
IBM Canada
Software developer

Carefully read the description of the package... it uses a particular variety of
splines. You should go read the paper they reference.

On May 12, 2020 4:37:32 PM PDT, Yousri Fanous <yousri.fanous at gmail.com>
wrote:
>Hello
>
>I created a MARS model from earth package.for one predictor EngDispl vs
>FE.
>These are the resulting coefficients:
>
> summary(marsFit)$coefficients
>                        y
>(Intercept)     18.049001
>h(EngDispl-4.3) -4.378082
>h(4.3-EngDispl) 10.925240
>h(EngDispl-2.3)  5.942387
>h(EngDispl-3.5) -2.552332
>
>I am at a loss at writing the equation linking the dependent and
>independent variables for such an output.
>What is h? Is it a function / operator?
>
>Thank you for your help
>
>Yousri fanous
>IBM Canada
>Software developer
>
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