Re: restricting interpolating functions to be positive
- To: mathgroup at smc.vnet.net
- Subject: [mg106428] Re: restricting interpolating functions to be positive
- From: dh <dh at metrohm.com>
- Date: Tue, 12 Jan 2010 04:49:27 -0500 (EST)
- References: <higdjs$kfi$1@smc.vnet.net>
Hi, Interpolation by default fits cubic polynomials. These tend to over/undershoot the points given. If you can live with linear interpolation, you may specify InterpolationOrder->0. Then the points are simply connected by straight lines. Daniel dantimatter wrote: > Hi All, > > I would like to construct an interpolation that can only take on > positive values. The data that I'm trying to interpolate is all > positive, but for some reason the Interpolation[] function 'wants' to > connect the dots by dipping below zero. Is there a way to force > positivity? Or should I simply adjust the InterpolationOrder until it > works? > > Thanks, > Dan >