[R] quantile from quantile table calculation without original data

[Martin Maechler]

>>>>> Jeff Newmiller 
>>>>>     on Fri, 05 Mar 2021 10:09:41 -0800 writes:

    > Your example could probably be resolved with approx. If
    > you want a more robust solution, it looks like the fBasics
    > package can do spline interpolation. 

base R's  spline package does spline interpolation !!

Martin