scatter random points around polynom
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Stefano Ferrari
on 5 Jan 2021
Answered: Stefano Ferrari
on 5 Jan 2021
I am trying to create random points around a defined polynomial.
The polynomial is created with defined points.
I have the polynom but I cannot creat the random points. Can someone please help me?
x_poly = [700 750 730 630 700 745 830 765 700];
y_poly = [0 266 570 780 1150 1300 1580 1880 2400];
%Create Polynom based on used point coordinates
t = (1:length(x_poly))';
Px = polyfit(t,x_poly,5);
Py = polyfit(t,y_poly,5);
ti = linspace(min(t),max(t));
plot(x_poly,y_poly,'o',polyval(Px,ti),polyval(Py,ti),'-')
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KSSV
on 5 Jan 2021
x_poly = [700 750 730 630 700 745 830 765 700];
y_poly = [0 266 570 780 1150 1300 1580 1880 2400];
%Create Polynom based on used point coordinates
t = (1:length(x_poly)); %<--- no transpose
Px = polyfit(t,x_poly,5);
Py = polyfit(t,y_poly,5);
ti = linspace(min(t),max(t));
plot(x_poly,y_poly,'o',polyval(Px,ti),polyval(Py,ti),'-')
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