如何使一组水平条具有相同的颜色？

这是一个技巧：一次
绘制 1 行的条形图，并用NaNs填充空间，同时为所有行指定一种颜色。绘图NaNs 将不绘制任何内容。

[ry, cy] = size(y);   %Number of rows and columns of y
hold on;
for k = 1:ry
    tmp = [NaN(k-1,cy); y(k,:); NaN(4-k,cy)];   %Filling with NaNs
    h{k} = barh(tmp, 'FaceColor', rand(1,3));   %Plotting bar graph in random color
    h{k} = h{k}(1);   %Store handle of any of the rows (Required for legend)
end
job = {'group1', 'group2', 'group3', 'group4'}; %Required legend entries
legend([h{:}], job);  %Default location is already 'northeast' (so can be skipped)

输出：