Clarification: S+Resample and S+BEST are separate libraries.
Both are available from
www.insightful.com/downloads/libraries
S+Resample contains a version of spline() with a `derivative'
argument, that could be used for the specific request below.
S+Best contains functions for density estimation, hazard regression,
and adaptive generalized linear modeling, all based on splines.
I don't think it has code for the specific request below.
There is a third library available from the same site, S+FunctionalData,
that could be used here, though it is probably overkill.
Tim Hesterberg
>For some unknown reason i'm having difficulties accessing the BEST
>library in version 7.0. Ideally, I would like to use spline() from
>the resample library in BEST but not currently possible. So i'm
>trying to replicate this with the bs(), essentially all i'm after is
>to calculate a column of first dervatives for my x-values at the
>known y values using a cublic spline. However, not sure how to
>convert the output matrix from bs() to the desired output (i.e. just
>a column of first derivatives).
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