RE: Deviation in plots of same function

*To*: mathgroup at smc.vnet.net*Subject*: [mg45971] RE: [mg45940] Deviation in plots of same function*From*: "David Park" <djmp at earthlink.net>*Date*: Sat, 31 Jan 2004 05:20:35 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Frank, You don't tell us what kind of plots you are making or give us examples. Mathematica approximates a curve by straight line segments. In Plot it uses an adaptive algorithm to determine the points that define the line segments. If you use two different plot domains, you will get different sets of points and the two curves will not lie exactly on top of each other. The plots might be improved by using the PlotPoints option and increasing the number of points. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Frank Richter [mailto:Frank.Richter at TU-Berlin.de] To: mathgroup at smc.vnet.net Dear Group, I define two plots of the same function, but with different range for the independent variable. Combining them without options, the two plots match. But if I want to enlarge a certain range of the independent variable deviations become visible. Why is that and how can I suppress that ? Thanks a bunch in advance, Frank ########################################################## Frank Richter Technical University of Berlin Department of Nonmetallic-Inorganic Materials Vitreous Materials Sekretariat ES 4 Englische Strasse 20 10587 Berlin Germany