Hello everyone, I would like to ask a question. How to plot only the (-pi:+pi) range of the following curve.

load jizuobiao1.mat

XX1=[THETA11;RHO11];

THETA11=linspace(-pi,+pi,length(RHO11))';

f1 = fit(THETA11,RHO11,'smoothingspline','SmoothingParam',0.99);%smoothingspline

plot(f1,THETA11,RHO11)%,THETA11,RHO11

plot(f1,'-r');

grid on;

hold on

load jizuobiao2.mat

XX2=[THETA12;RHO12];

f2 = fit(THETA12,RHO12,'smoothingspline','SmoothingParam',0.99);%smoothingspline

plot(f2,THETA12,RHO12)

%plot(f2,'-b');

%grid on;

hold on

Answer 1

[KSSV]

load jizuobiao2.mat
THETA12 = linspace(-pi,+pi,length(RHO12)) ;
f2 = fit(THETA12,RHO12,'smoothingspline','SmoothingParam',0.99);%smoothingspline
plot(f2,THETA12,RHO12)