> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of cyrille henry > Sent: 10 June 2008 16:30 > To: Charles Henry > Cc: [email protected] > Subject: Re: [PD] better tabread4~ > > > > Charles Henry a écrit : > > On Tue, Jun 10, 2008 at 4:43 AM, cyrille henry > > <[EMAIL PROTECTED]> wrote: > > > >> i realized that the 4 points interpolation in tabread4~ > (and tabosc4~) are not optimal. > > > > Please describe. I've analyze the interpolation formula too, and I > > think that it is a true cubic interpolation. Is the numerical > > accuracy bad? > > well, i think the tabread4~ interpolation is a lagrange > interpolator (but i'm may be wrong). > at least with tabread4~, the 1st derivative is not > continuous, while it should be with a cubic interpolation. > > i program a cubic interpolation, and the shape of the > waveform is really different.
Are we talking about 4-point polynomial interpolation versus cubic spline interpolation? These are indeed different. _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
