How sampling 3d scattered points
显示 更早的评论
Hi everyone,
I have a 3D matrix that represents the coordinates of 108 points in the 3d Cartesian space. So, for every row, i have the coordinates of a point. These points represent the centerline of a leaflet of the mitral valve.
My goal is to sample this points in order to pass from 108 points to 32 points keeping the same shape of the centerline of the leaflet of the mitral valve of the 108 points.
How can i do this?
Thanks in advance for the help.
I have attached also a figure that represents the position of the points.
Lorenzo
回答（1 个）
Ameer Hamza
2020-12-3
One option is to use interp1()
X = rand(108, 3);
t = linspace(0,1,size(X,1));
t_new = linspace(0,1,32);
X_new = interp1(t, X, t_new);
4 个评论
Lorenzo Bennati
2020-12-3
Ameer Hamza
2020-12-3
rand(108,3) is just an example, If you matrix name is S, you can change X to S
t = linspace(0,1,size(S,1));
t_new = linspace(0,1,32);
S_new = interp1(t, S, t_new);
Note: this assumes that matrix is 108x3, i.e., each row is a point.
Lorenzo Bennati
2020-12-3
Ameer Hamza
2020-12-3
I am glad to be of help!!!
类别
在 帮助中心 和 File Exchange 中查找有关 Surface and Mesh Plots 的更多信息
2020-12-3
2020-12-3
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
