tag:blogger.com,1999:blog-6555947.post7990148687434386629..comments2022-01-16T20:22:20.198-07:00Comments on The Geomblog: Plotting implicit functions: a bleg..Suresh Venkatasubramanianhttp://www.blogger.com/profile/15898357513326041822noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-6555947.post-83285859538646991452012-04-04T00:22:42.486-06:002012-04-04T00:22:42.486-06:00I used the free software available here
http://ww...I used the free software available here <br />http://www.padowan.dk/graph/<br />It has a utility called "relation" in which you may define functions of the form f(x,y)= C. It is meant for windows but I installed it just fine on Ubuntu-9.04 using wine. Works great.<br /><br />Abhinavabhinavhttps://www.blogger.com/profile/17836532413279872775noreply@blogger.comtag:blogger.com,1999:blog-6555947.post-35161732910432287182011-07-30T09:56:41.293-06:002011-07-30T09:56:41.293-06:00I second the recommendation of gnuplot
(http://www...I second the recommendation of gnuplot<br />(http://www.gnuplot.info; alas the .org seems to be owned by a domain squatter).<br />It has excellent support for parametric functions (x = x(t,u), y = y(t,u), z = z(t,u)), and reasonable support for both 2-D and 3-D contours.Jonathan Thornburgnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-24812144282388936612008-02-09T10:46:00.000-07:002008-02-09T10:46:00.000-07:00MATLAB has the command contour and isosurf. Amusin...MATLAB has the command contour and isosurf. <BR/><BR/>Amusingly grapher the OS X utility also plots implicits via extracting isosurfaces (or curves / contour lines).Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-33214882977451709002008-02-05T11:50:00.000-07:002008-02-05T11:50:00.000-07:00With a little wiggling, the common and freely avai...With a little wiggling, the common and freely available gnuplot can do this: http://t16web.lanl.gov/Kawano/gnuplot/implicit/solve-e.htmlBrian Sniffenhttps://www.blogger.com/profile/02725661581513997671noreply@blogger.comtag:blogger.com,1999:blog-6555947.post-67744678816653031342008-01-31T23:04:00.000-07:002008-01-31T23:04:00.000-07:00Try TexasInstruments T-98 thay are compact for tra...Try TexasInstruments T-98 thay are compact for travel and you can usually buy them used;via. pawn shops, consignment shops, etc....Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-74634512038727037652008-01-31T03:52:00.000-07:002008-01-31T03:52:00.000-07:00Can't you just take g(x,y) = f(x,y)-c ?Can't you just take g(x,y) = f(x,y)-c ?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-6538459676276785512008-01-29T13:36:00.000-07:002008-01-29T13:36:00.000-07:00What an opportunity to advertize our tool ;-) (for...What an opportunity to advertize our tool ;-) (for algebraic curves only)<BR/><BR/>http://exacus.mpi-inf.mpg.de/cgi-bin/xalci.cgi<BR/><BR/>You can try it online with our browserAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-7227707619798297452008-01-29T11:45:00.000-07:002008-01-29T11:45:00.000-07:00Grapher (comes with every mac) seems to work prett...Grapher (comes with every mac) seems to work pretty well. I tried plotting log(xy) = 1. <BR/><BR/>-sergeiAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-30282643035563891462008-01-29T09:16:00.000-07:002008-01-29T09:16:00.000-07:00Maple does it with implicitplot()Not sure how grea...Maple does it with implicitplot()<BR/><BR/>Not sure how great it is though...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6555947.post-13007460845884901842008-01-29T08:01:00.000-07:002008-01-29T08:01:00.000-07:00ah that's the problem. my function has logs in it....ah that's the problem. my function has logs in it. But some of the other options seem doable.Suresh Venkatasubramanianhttps://www.blogger.com/profile/15898357513326041822noreply@blogger.comtag:blogger.com,1999:blog-6555947.post-36406663574820984012008-01-29T04:00:00.000-07:002008-01-29T04:00:00.000-07:00I'd go with surfhttp://surf.sourceforge.netIt lets...I'd go with surf<BR/>http://surf.sourceforge.net<BR/><BR/>It lets you plot implicit curves and surfaces, and does a surprisingly good job of it. Main drawback: it only takes algebraic specifications (i.e. f needs to be a polynomial), and it doesn't have comfortable rotation and zooming.<BR/><BR/>Mouse grab-and-pull rotation and zooming has been added to the surfer extension GUI<BR/>http://surfer.imaginary2008.demichiexilehttps://www.blogger.com/profile/00008302080954798496noreply@blogger.comtag:blogger.com,1999:blog-6555947.post-53000285802928343692008-01-29T00:48:00.000-07:002008-01-29T00:48:00.000-07:00If you are OK with commercial tools, Mathematica's...If you are OK with commercial tools, Mathematica's ContourPlot does it<BR/>http://www.yaroslavvb.com/research/qr/implicit-plots/implicit.html<BR/>http://reference.wolfram.com/mathematica/ref/ContourPlot3D.htmlYaroslav Bulatovhttps://www.blogger.com/profile/06139256691290554110noreply@blogger.comtag:blogger.com,1999:blog-6555947.post-54918137212567323782008-01-28T23:33:00.000-07:002008-01-28T23:33:00.000-07:00http://matplotlib.sourceforge.netIf you eventually...http://matplotlib.sourceforge.net<BR/><BR/>If you eventually want 3D contours, then VTK should do the job.Unknownhttps://www.blogger.com/profile/05566851554483852450noreply@blogger.com