Re: How to get the slope of a Interpolation[] function at a specified point?

*To*: mathgroup at smc.vnet.net*Subject*: [mg26591] Re: How to get the slope of a Interpolation[] function at a specified point?*From*: "Kevin J. McCann" <KevinMcCann at home.com>*Date*: Thu, 11 Jan 2001 10:39:07 -0500 (EST)*References*: <93ee40$dh@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Unless I have missed your point, you can just use slope = gear'[x] Note that Gear (with a capital G) is protected - at least under 4.0. Kevin The wise words of liwen liwen on 9 Jan 2001 02:20:32 -0500: > Dear Friends: > How are you! > I want to get the slope of a > Interpolation[] function at a specified point, > for example,here is a Interpolation function : > geartable={{0,0},{1,1},{2,3},{3,4},{4,6},{5,7},{6,9.5},{7,12},{8,14}}; > Gear=Interpolation[geartable]; > y=Gear[4.5]; > > I want to get the slope of Gear function at the point > of {4.5,y},what should I do ? > Can I use the FunctionInterpolation[] to make out a > precise function to find the slope value ? > Is the FunctionInterpolation[] precise enough to get > the very precise slope value ? > > Best Regards, > > Liwen E-mail: gzgear at yahoo.com > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Photos - Share your holiday photos online! > http://photos.yahoo.com/ >