Re: POLE-ZERO PLOTS

*To*: mathgroup at smc.vnet.net*Subject*: [mg18726] Re: POLE-ZERO PLOTS*From*: paulh at wolfram.com (P.J. Hinton)*Date*: Sat, 17 Jul 1999 02:36:44 -0400*Organization*: Wolfram Research, Inc.*References*: <7mjsbi$fcg@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

In article <7mjsbi$fcg at smc.vnet.net>, "BA" <aliane at javanet.com> writes: > In control systems, it is a custom to represent the poles of a transfer > function by "X", and the zeros by "o". When, I use mathematica to get the > pole-zero plot, I am not sure how to display poles with crosses "x"...the > only function I'm aware of is PointSize...but this function uses a different > symbol. > Is there anybody out there who can propose a straightforward way to do it. Use a Text[] primitive in your graphic to place x's and o's in the places of your poles and zeroes. Someone has already written a simple function for generating these kinds of plots in Mathematica. You can find it in the notebook that makes up this MathSource item. http://www.mathsource.com/Content/Applications/Engineering/Electrical/Signals/0205-546 -- P.J. Hinton Mathematica Programming Group paulh at wolfram.com Wolfram Research, Inc. Disclaimer: Opinions expressed herein are those of the author alone.