[R] Add a function in rq

[mael]

Hi,

I am trying to add a function in a linear quantile regresion to find a
breakpoint. The function I want to add is:

y=(k+ax)(x<B)+(k+(a-d)B+dx)(x>B) 

How do I write it in the rq() function? Do I need to define the parameters
in any way and how do I do that? I'm a biologist new to R.

Thanks!


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