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From: philip <pg48@sussex.ac.uk>
Newsgroups: comp.soft-sys.matlab
Subject: Bode plots in R2007b
Date: Sat, 12 Apr 2008 13:57:59 EDT
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Hi! I have encountered a problem whilst trying to do a bode plot - when I enter

bode ([3,5,6],[2,6,8])

i get this message - 

??? Error using ==> feval
Input argument "b" is undefined.

Error in ==> wrfc.plot.init_listeners>LocalRefreshPlot at 108
   draw(this)

can anyone help me? I am not very experienced with matlab - any help would be greatly appreciated!