poster
2019-12-10, 20:48
我在MATLAB中有一个2D散点图。是否可以对散点图进行插值以创建面积图？
回答：
如果您只是想在整个散布点周围绘制一个大的填充多边形，则可以使用函数CONVHULL (http://www.mathworks.com/help/techdoc/ref/convhull.html)查找包含点的凸包，并使用PATCH (http://www.mathworks.com/help/techdoc/ref/patch.html)显示凸包：
x = rand(1,20); %# 20 random x values y = rand(1,20); %# 20 random y values hullPoints = convhull(x,y); %# Find the points defining the convex hull patch(x(hullPoints),y(hullPoints),'r'); %# Plot the convex hull in red hold on; %# Add to the existing plot scatter(x,y); %# Plot your scattered points (for comparison) 这是结果图：
https://i.stack.imgur.com/W5Sri.png
更多&回答... (https://stackoverflow.com/questions/3965627)
回答：
如果您只是想在整个散布点周围绘制一个大的填充多边形，则可以使用函数CONVHULL (http://www.mathworks.com/help/techdoc/ref/convhull.html)查找包含点的凸包，并使用PATCH (http://www.mathworks.com/help/techdoc/ref/patch.html)显示凸包：
x = rand(1,20); %# 20 random x values y = rand(1,20); %# 20 random y values hullPoints = convhull(x,y); %# Find the points defining the convex hull patch(x(hullPoints),y(hullPoints),'r'); %# Plot the convex hull in red hold on; %# Add to the existing plot scatter(x,y); %# Plot your scattered points (for comparison) 这是结果图：
https://i.stack.imgur.com/W5Sri.png
更多&回答... (https://stackoverflow.com/questions/3965627)