Re: [R] create function to solve derivative

2012-11-16 Thread Peter Ehlers
On 2012-11-16 01:30, Berend Hasselman wrote: On 16-11-2012, at 09:43, e-letter wrote: On 16/11/2012, Rolf Turner wrote: Your question makes little sense. Functions have derivatives --- at least some of them do. Data sets do not have derivatives. The functions D(), deriv() etc. work on sp

Re: [R] create function to solve derivative

2012-11-16 Thread Berend Hasselman
On 16-11-2012, at 09:43, e-letter wrote: > On 16/11/2012, Rolf Turner wrote: >> >> Your question makes little sense. Functions have derivatives --- at >> least some of them do. Data sets do not have derivatives. The >> functions D(), deriv() etc. work on specified analytic expressions >> for

Re: [R] create function to solve derivative

2012-11-16 Thread e-letter
On 16/11/2012, Rolf Turner wrote: > > Your question makes little sense. Functions have derivatives --- at > least some of them do. Data sets do not have derivatives. The > functions D(), deriv() etc. work on specified analytic expressions > for functions --- data sets do not come into the pictu

Re: [R] create function to solve derivative

2012-11-15 Thread Rolf Turner
On 16/11/12 02:40, e-letter wrote: Readers, A data set comprises A B C 10 6 .2 20 7 .4 30 8 .16 40 9 .0256 My requirement is to obtain the derivative for values of A with respect to B, create a function in R and plot this derivative again