Re: Help with rlocus appearance of initial location of poles and zeros

[Beginner1]

Hi Doug,

Thank you for your answer. The markersize for the origin of poles in root
locus is a good one since the "X" symbol is perfectly seen. However, the
location of zeros is not that observable. Still they are very small when I
execute this code:

%ki=1;

kp=1.5;

w=314.159;


num=([kp ki kp*w.^2]);

den=([1 0 w.^2]);

sis=tf(num,den);

[RLDATA, ki] = rlocus (sis, 0.1, 0, 500);

%plot(rlocus(sis),"*","markersize",1)

rlocus(sis)


nr=roots(num);

dr=roots(den);

hold on 

plot(nr,"co","markersize",15)

plot(dr,"rx","markersize",15)


hold off


<http://octave.1599824.n4.nabble.com/file/t372684/Captura.jpg>  

I tried to increase the markersize but I didn´t observe any improvement. 

Best regards,

Marta



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