散点差值模板：使用griddata函数
例：给定一些离散的点坐标与对应深度，该区域对应的图形。
板子如下：
clc,clear x=[129,140,103.5,88,185.5,195,105,157.5,107.5,77,81,162,162,117.5]; y=[7.5,141.5,23,147,22.5,137.5,85.5,-6.5,-81,3,56.5,-66.5,84,-33.5]; z=-[4,8,6,8,6,8,8,9,9,8,8,9,4,9]; xmn=minmax(x); ymn=minmax(y); xi=xmn(1):xmn(2); yi=ymn(1):ymn(2); yi=yi‘; zi1=griddata(x,y,z,xi,yi,‘cubic‘); zi2=griddata(x,y,z,xi,yi,‘nearest‘); zi=zi1; zi(isnan(zi1))=zi2(isnan(zi1)); subplot(1,2,1),plot(x,y,‘*‘) subplot(1,2,2),mesh(xi,yi,zi)
注意，xi和yi是需要相同维数或者一行一列的向量，于是在处理之前需要将yi进行转置，不然会报错。
原文：https://www.cnblogs.com/BeyondW/p/13641322.html