how can i fit smooth curve through these points ?

dear all

i have data point like below and i want to fit smooth curve (interpolate) through these point

x=0,0.0521848353989790,0.0650347106509774,0.0290795069951748,-0.0285693207263949
y=0,0.0247909821202880,0.0806454201568941,0.126123623558399,0.127238625523199
z=0,-0.00507868172844240,-0.0139159756869431,-0.0155072305512437,-0.00870218062387152

i use curve fitting toolbox for 2D data point and it works fine but when i want to use it with 3D data point i receive surface instead of curve

and i really appreciated if i could do this with cod instead of using tool box

Answer 1

[John D'Errico]

Download interparc from the file exchange.

xyzint = interparc(100,x',y',z','spline');
plot3(x,y,z,'o')
grid on
box on
hold on
plot3(xyzint(:,1),xyzint(:,2),xyzint(:,3),'-r')

No "toolbox" required. But you will need interparc.

Could you write the code yourself? Of course. Interparc is just one function. Not even that complicated.

[Jim Riggs]

Very cool John!

[shahin hashemi]

thank you very much john