File: sgrid.cat

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scilab 2.6-4
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sgrid            Scilab Group            Scilab Function              sgrid
NAME
   sgrid - s-plane grid lines.
  
CALLING SEQUENCE
 sgrid()
 sgrid('new')
 sgrid(zeta,wn [,color])
DESCRIPTION
   Used in conjonction with evans,  plots lines of constant damping ratio
  (zeta) and natural frequency (wn).
  
 sgrid()
       : add a grid over an existing continuous s-plane root with default values
      for zeta and wn.
      
 sgrid('new')
       : clears the graphic screen and then plots a default  s-plane grid 
      
 sgrid(zeta,wn [,color])
       : same as sgrid() but uses the provided damping ratio and  natural
      frequency.
      
EXAMPLE
 H=syslin('c',352*poly(-5,'s')/poly([0,0,2000,200,25,1],'s','c'));
 evans(H,100)
 sgrid()
 sgrid(0.6,2,7)
SEE ALSO
   evans