Re: [R] Numerical Derivative / Numerical Differentiation of unkno wn funct ion

2005-05-06 Thread Duncan Murdoch
Uzuner, Tolga wrote: Ah... I searched for half an hour for this function... you know, the help function in R could really be a lot better... help() assumes you know the name of the thing you're looking for. You should be using help.search('derivative'), which for me gave width.SJ(MASS)

RE: [R] Numerical Derivative / Numerical Differentiation of unkno wn funct ion

2005-05-05 Thread Uzuner, Tolga
Ah... I searched for half an hour for this function... you know, the help function in R could really be a lot better... But wait a minute... looking at this, it appears you have to pass in an expression. What if it is an unknown function, where you only have a handle to the function, but you

Re: [R] Numerical Derivative / Numerical Differentiation of unkno wn funct ion

2005-05-05 Thread Peter Dalgaard
Uzuner, Tolga [EMAIL PROTECTED] writes: Ah... I searched for half an hour for this function... you know, the help function in R could really be a lot better... But wait a minute... looking at this, it appears you have to pass in an expression. What if it is an unknown function, where you