Yes. C:\Motor>graphRdat T HB1M_Core25_No_Field_No_Epoxy_800Am.rdat s = splin( h', b', 'monotone' ); !--error 999 splin: Wrong value for input argument #1: Not (strictly) increasing or +-inf detected. at line 22 of exec file called by :
Since there are no inf values in the data; that kind of implies that it requires monotonic input in order to produce monotonic output; which ain't so useful. That said, I get that same error message whichever variation of the splin() function I try.... Which suggests there's something wrong with my data, but that stupid cos the data is real. The math has to adapt to the data not the other way around. > -----Original Message----- > From: scilab.browseruk.b28bd2e902.jrafaelbguerra#hotmail....@ob.0sg.net > Sent: Mon, 4 Apr 2016 11:20:13 +0200 > To: users@lists.scilab.org > Subject: Re: [Scilab-users] "Smoothing" very localised discontinuities in > (scilab: to exclusive) curves. > > Hi Buk. > > Have you tried Scilab's cubic splines using the "monotone" option? > > Regards, > Rafael > > -----Original Message----- > From: users [mailto:users-boun...@lists.scilab.org] On Behalf Of > scilab.20.browse...@xoxy.net > Sent: Sunday, April 03, 2016 9:09 PM > To: users@lists.scilab.org > Subject: [Scilab-users] "Smoothing" very localised discontinuities in > curves. > > HI, > > The data I'm dealing with is experimentally produced; and thus contains > occasional, localised discontinuities (inflections), that I need to > remove > before that data is suitable for is use in FEM modeling software, which > requires > that it be strictly monotonic. The attachment shows the full curve plus a > close > up of a couple of examples of the type of discontinuity I need to deal > with. > > I haven't yet decided whether to simply omit points (thus connect A to F > & G to > J) or whether to retain the same number of points by interpolating new > points > onto that line as shown in red. > > I've looked and played several of the smoothing, convolution and > interpolation > routines that scilab provides, but (besides that I don't understand the > output > some of them produce) they also seem to affect the data more than I would > like. > Some seem to introduce a 'phase shift'; others smooth out larger scale > bumps in > the curve that need to be retained; and others generate many extra points > which > I don't think is helpful, the FEM software is going to do its own > interpolations > anyway. > > > But the bit I'm asking about here is how to detect point A&F and G&J? > > Any thoughts or pointers as to a) the algorithm to use; b) how to > implement it > in SciLab? > > Cheers, Buk. > > ____________________________________________________________ > Can't remember your password? Do you need a strong and secure password? > Use Password manager! It stores your passwords & protects your account. > Check it out at http://mysecurelogon.com/password-manager > > _______________________________________________ > users mailing list > users@lists.scilab.org > http://lists.scilab.org/mailman/listinfo/users ____________________________________________________________ FREE ONLINE PHOTOSHARING - Share your photos online with your friends and family! Visit http://www.inbox.com/photosharing to find out more! _______________________________________________ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users