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/usr/lib/R/site-library/numDeriv/NAMESPACE is in r-cran-numderiv 2016.8-1-1.

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export("grad")
S3method("grad", "default")

export("jacobian")
S3method("jacobian", "default")

export("hessian")
S3method("hessian", "default")

export("genD")
S3method("genD", "default")