how can plot the region of convergence?

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sara
sara on 3 Apr 2016
Commented: sara on 3 Apr 2016
hi all can you guide me how can plot the region of convergence? for example for below image?
thanks

Answers (1)

Image Analyst
Image Analyst on 3 Apr 2016
See the FAQ for how to create and plot circles http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F
You can also use fill() or patch() to fill it with color, so you might plot a filled gray one, and then put "hold on" and place a smaller white one on top of it.
  4 Comments
sara
sara on 3 Apr 2016
thanks. this work true :)
Is there any way to fill out of the circle? like below?

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