Re: How to extract data from an analytical summation equation?

*To*: mathgroup at smc.vnet.net*Subject*: [mg86485] Re: How to extract data from an analytical summation equation?*From*: dh <dh at metrohm.ch>*Date*: Wed, 12 Mar 2008 00:14:20 -0500 (EST)*References*: <fr5dur$o4j$1@smc.vnet.net>

Hi Jinglei, Questions can be answered better if you give a bit more info. What you can do is to extract data from the graphics. Assume you are using CountourPlot like: g=ContourPlot[x^2+y^2/3==1,{x,-1,1},{y,-1,1}] now everything you want is in g, but we need to extract it. In this case you may say: points=g[[1]]/.GraphicsComplex[pts_,__]->pts ; ListPlot[points] this gives you the points of the plot. hope this helps, Daniel Jinglei Yang wrote: > Dear all, > > I have a complex equation and can plot a curve when setting the variable range. > The question is: how to extract the data set at a certain interval so I can > replot it in other software? > > Thank you so much. > > Jinglei @ UIUC