功能描述

使用matlab读取三维点云，并获取其中点的空间坐标，并截取某个平面

clear;clc;
format long;
j = 0;k = 0;n = 0;
sign = 0;temp = 0;
T = zeros(1,1);
A = pcread('teapot.ply');
figure(1);
pcshow(A);
pause(1);
B = A.Location;
m = length(B);
for i = 1:m
    s = 0;t = i;
    for j = 1:m
        if B(i,3) == B(j,3)
            s = s + 

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