MATLAB: Hello everyone, I would like to ask how to keep only the fitted curve and delete the data points in the picture below. The program is shown below, I don’t know how to modify it.

Question

code：

load data.mat

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

plot(f1,THETA11,RHO11)

Answer 1

plot(f1)