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*Subject*: TRIANGULATE says "Points are co-linear, no solution"*From*: Jonathan Joseph <jj(at)scorpio.tn.cornell.edu>*Date*: Thu, 11 Nov 1999 17:23:39 -0500*Newsgroups*: comp.lang.idl-pvwave*Organization*: Cornell University*Sender*: verified_for_usenet(at)cornell.edu (jj21 on scorpio.tn.cornell.edu)*Xref*: news.doit.wisc.edu comp.lang.idl-pvwave:17234

TRIANGULATE says "Points are co-linear, no solution" This really bugs me, because it's just not true. Well, it may be true for a subset of the points I'm trying to triangulate, but certainly not all. Is the IDL triangulate code just really weak? I wish I had an example of this with a small number of points. I thought I should be able to get a triangulation with just about any set of points, except for one in which all of the points lie along the same line. This is certainly not true for my dataset - in fact, I think it looks darned reasonable, and I want to resample onto a regular grid dammit! Anyway, if anyone wants to take a look, Please! The data set is a file called test.dat (saved on hp-ux using writeu. I hope there are no byte swapping problems for other platforms) ftp://scorpio.tn.cornell.edu/jj/idl/ IDL> x=fltarr(9853) IDL> y=fltarr(9853) IDL> openr,unit,'test.dat',/get_lun IDL> readu,unit,x, IDL> triangulate,x,y,tr,b % TRIANGULATE: Points are co-linear, no solution. ;; see the data (doesn't look bad to me) IDL> plot,xx,yy,/device,psym=3 HELP!! Thanks. BTW, this was orignally a double array - that didn't work either. -Jonathan

**Follow-Ups**:**Re: TRIANGULATE says "Points are co-linear, no solution"***From:*Craig Markwardt

**Re: TRIANGULATE says "Points are co-linear, no solution"***From:*Jonathan Joseph

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