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help for ^fpderiv^                                            (STB-25: sg26.3)
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Calculate derivatives of fractional polynomial (FP)
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	^fpderiv^ newvar [^,^ ^pow^ers^(^powlist^)^ ^co^effs^(^coeff_list^)^ 
                                ^n^ext ^cu^rvature ^dc^urvature ]


Description
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^fpderiv^ calculates the analytic first derivative of the FP function associated
with the most recently fitted FP model.  The result is stored in ^newvar^.


Options
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^coeffs()^ specifies the coefficients of the FP function.  By default, the
    estimated coefficients from the most recent FP model are used.  Note that
    the coefficient list omits the constant, since this term plays no part in
    the derivative.

^curvature^ calculates the scaled curvature of the FP function instead of the
    first derivative.

^dcurvature^ calculates the derivative of the curvature.

^next^ calculates the next higher derivative.  For instance, if you just used
    ^fpderiv^ to calculate the first derivative, then ^fpderiv d2, next^
    would calculate the second derivative.

^powers()^ specifies the powers of the FP function.  By default, the powers used
    with the most recent FP model are used.


Also see
--------

    STB:  STB-21: sg26,  STB-22: sg26.1,  STB-25: sg26.3
On-line:  help for @fp@.