Re: combining contourplot and regionplot

*To*: mathgroup at smc.vnet.net*Subject*: [mg98465] Re: combining contourplot and regionplot*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Fri, 10 Apr 2009 04:55:14 -0400 (EDT)*Organization*: Uni Leipzig*References*: <grkgpr$72h$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de

Hi, ContourPlot[ Arg[Gamma[x + I*y]] == 0, {x, -5, 5}, {y, -5, 5}, RegionFunction -> Function[{x, y, z}, Abs[Gamma[x + I*y]] > 1] ] Regards Jens Cristina Ballantine wrote: > Given a complex function (say the Gamma function), I would like to plot > all points (x,y), -10<x<10, -10<y<10, that map to the interval (1, > infinity). I need to plot all points with Arg[Gamma[x+I*y]]==0 and > Abs[Gamma[x+I*y]]>1. Solutions to the equation can be plotted with > ContourPlot. Solutions to the inequality can be plotted with RegionPlot. > But how do I plot points that satisfy BOTH the equation and the inequality? > A similar question has been asked on the Forum before but did not receive > an answer. I am hoping this time someone can help. Thank you. > > Cristina >