Displaying 1 result from an estimated 1 matches for "defferentiate".
2011 May 25
0
approximate function and find local peaks (Maxima or Minima)
....5
25 2011-05-02 10:01:20 7601.5
I want to approximate this data (actually I dont care, whether keep the
time information, or lose it, while making it a function)
With approxfun( ), it seems, like I managed to apprximate a function.
f <- approxfun(2:nrow(CB), CB[2:nrow(CB),2])
But how do I defferentiate f()?
g<-deriv(f(2:nrow(CB)),"x")
Did not work out for me, or at least, I dont know how to get those "x",
with g(x)=0.
My ultimate goal, is to find all the local minima of CB[,2]. (min() gives
only the global minimum)
Any suggestions how to do it?
Thanks for your help in...