Dear R People:
When the D function is used for a symbolic derivative,
an expression is returned, which is fine.
How do you change that expression to a function, please?
I've been experimenting with substitute and deparse, but no success
yet.
This is R 1.8.0 for Windows.
thanks in advance for
Would it work to use deriv with the optional function.arg argument?
In some ways deriv is just a wrapper around repeated calls to D. (It
does a bit more than that but you could think of it that way.)
Erin Hodgess [EMAIL PROTECTED] writes:
Dear R People:
When the D function is used for a
You should be able to use deriv(..., func=TRUE) to get a function returned,
instead of an expression.
If you need to use D, here's a rather clumsy way that seems to work:
dx2x - D(expression(x^2), name=x); dx2x
2 * x
eval(parse(text=paste(f - function(x){,
