[R] deriv value revised question
Martin Henry H. Stevens
hstevens at rci.rutgers.edu
Tue May 22 22:37:30 CEST 2001
Is the simplest way to get eval( deriv(~F,"x") ) to return ONLY the values
derivative of F evaluated at x by using
attr( eval( deriv( ~F, "x" ) ), "gradient") ?
If so, what is the rationale behind this?
Many thanks in advance for the edification,
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