create a 3D smoothing with csaps (or similar)
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To get a better set of nodes arranged in space as a ‘curve’, how can I improve this code? Could you suggest?
load curve_1
cc = curve_1; %or curve_2
x = cc(:,1);
y = cc(:,2);
z_min = min(cc(:,3));
z_max = max(cc(:,3));
z = z_min:0.1:z_max;
z = z';
% code
[pp,p] = csaps(z,[x;y]);
val = fnval(pp,z);
figure
plot3(x,y,z);
hold on
plot3(val(1,:),val(2,:),z,'r-')
grid on
0 件のコメント
採用された回答
Mathieu NOE
2024 年 6 月 7 日
hello again !
as your post title is about smoothing, this is what I propose , based on the fex submission :
I attached the function in my answer if it makes your life simpler
now, maybe we should also create some intermediate points with interpolation (will be done just after this first answer)
so the starter :
load curve_1
cc = curve_1; %or curve_2
% load curve_2
% cc = curve_2; %or curve_2
x = cc(:,1);
y = cc(:,2);
z = cc(:,3);
% smoothing (if needed)
[zz,s,exitflag] = smoothn({x,y,z},1);
xn = zz{1};
yn = zz{2};
zn = zz{3};
plot3(x,y,z,'*');
hold on
plot3(xn,yn,zn);
4 件のコメント
Mathieu NOE
2024 年 6 月 10 日
My pleasure , and thanks again for accepting my answer
you can also reward other contributors by voting
その他の回答 (1 件)
Matt J
2024 年 6 月 7 日
編集済み: Matt J
2024 年 6 月 7 日
load curve_1
cc = curve_1; %or curve_2
x = cc(:,1);
y = cc(:,2);
z = cc(:,3);
t=linspace(0,1,height(cc));
tu=linspace(0,1,5*height(cc));
% code
[pp,p] = csaps(t,cc',0.995);
val = fnval(pp,tu);
figure
plot3(x,y,z,'o');
hold on
plot3(val(1,:),val(2,:),val(3,:),'r-')
grid on
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