init

FOTF Toolbox/@fotf/rlocus.m

@@ -0,0 +1,19 @@
+function rlocus(G)
+% rlocus - draw the root locus of a SISO FOTF object
+%
+%   rlocus(G)
+% 
+%   G - a SISO FOTF object
+
+% Copyright (c) Dingyu Xue, Northeastern University, China
+% Last modified 28 March, 2017 
+% Last modified 18 May, 2022 
+   if numel(G)==1
+      [G1,alpha]=fotf2cotf(G); rlocus(G1), xm=xlim;
+      if alpha<1, xm(1)=0; else, xm(2)=0; end
+      line(xm,tan(alpha*pi/2)*xm), line(xm,-tan(alpha*pi/2)*xm)
+      line(xm,tan(alpha*pi)*xm), line(xm,-tan(alpha*pi)*xm)
+   else
+      error('Root locus only applies to SISO systems');
+   end
+end