bar3 matlab中的颜色和图例

Question

我正在使用类似以下命令来堆叠四组数据并在 matlab 中使用 bar3 绘制它们。如何为每组数据设置不同的颜色和图例？

下图。

figure(100);

for i=1:4
     bar3(data.matrix{i})
     hold on;
end

Answer 1

关于对每个条进行着色，解决方案是：

Y=[ 1 2 3 ; 4 5 6 ; 3 4 5];
h = bar3(Y);
cm = get(gcf,'colormap');  % Use the current colormap.
cnt = 0;
for jj = 1:length(h)
    xd = get(h(jj),'xdata');
    yd = get(h(jj),'ydata');
    zd = get(h(jj),'zdata');
    delete(h(jj))    
    idx = [0;find(all(isnan(xd),2))];
    if jj == 1
        S = zeros(length(h)*(length(idx)-1),1);
        dv = floor(size(cm,1)/length(S));
    end
    for ii = 1:length(idx)-1
        cnt = cnt + 1;
        S(cnt) = surface(xd(idx(ii)+1:idx(ii+1)-1,:),...
                         yd(idx(ii)+1:idx(ii+1)-1,:),...
                         zd(idx(ii)+1:idx(ii+1)-1,:),...
                         'facecolor',cm((cnt-1)*dv+1,:));
    end
end
rotate3d

source and additional information here

注意：关于 bar3 绘图的 Matlab 帮助是 here