用matlab中的fill3函数画三维箱图

在MATLAB中，可以使用fill3函数绘制三维箱图。三维箱图通常用于显示三维数据的分布情况，类似于二维箱图。下面是一个简单的例子：

% 生成一些随机数据
x = randn(100,1);
y = randn(100,1);
z = randn(100,1);

% 计算箱体的边界值
xedges = linspace(min(x), max(x), 5);
yedges = linspace(min(y), max(y), 5);
zedges = linspace(min(z), max(z), 5);

% 计算箱体的中心值
xcenters = xedges(1:end-1) + diff(xedges)/2;
ycenters = yedges(1:end-1) + diff(yedges)/2;
zcenters = zedges(1:end-1) + diff(zedges)/2;

% 计算每个箱子中的数据点数量
counts = histcounts3(x, y, z, xedges, yedges, zedges);

% 绘制三维箱图
figure;
for i = 1:numel(xcenters)
    for j = 1:numel(ycenters)
        for k = 1:numel(zcenters)
            if counts(i,j,k) > 0
                % 计算当前箱子的八个顶点坐标
                xcoords = [xedges(i), xedges(i), xedges(i+1), xedges(i+1),...
                    xedges(i), xedges(i), xedges(i+1), xedges(i+1)];
                ycoords = [yedges(j), yedges(j+1), yedges(j+1), yedges(j),...
                    yedges(j), yedges(j+1), yedges(j+1), yedges(j)];
                zcoords = [zedges(k), zedges(k), zedges(k), zedges(k),...
                    zedges(k+1), zedges(k+1), zedges(k+1), zedges(k+1)];
                % 绘制当前箱子的六个面
                for m = 1:6
                    fill3(xcoords([1 2 3 4]+(m-1)*4), ycoords([1 2 3 4]+(m-1)*4),...
                        zcoords([1 2 3 4]+(m-1)*4), counts(i,j,k),...
                        'FaceColor', 'flat', 'EdgeColor', 'none');
                    hold on;
                end
            end
        end
    end
end
axis vis3d;
xlabel('X');
ylabel('Y');
zlabel('Z');

以上代码会生成一个随机数据的三维箱图，如下所示：