MATLAB：如何绘制具有不同尺度和不同数据集的多个水平条形图？

Question

我想绘制一张与下图中的on完全相同的条形图。

我无法做的是绘制2组数据，一组分别位于“0”的左侧，另一组分别位于右侧，每个数据在x上使用不同的比例-轴。使用函数barh有关于如何移动基线的说明，但在这种情况下，有两组具有不同比例的不同数据。

例如，我试图绘制以下数组：

left = [.1; .5; .4; .6; .3]; % Scale 0-1, grows leftwards
right = [24; 17; 41; 25; 34]; % Scale 0-35, grows rightwards

有任何提示吗？

Answer 1

要处理不同的缩放比例，您可以手动将left中的值乘以缩放，然后修改该侧的刻度线。

% Automatically determine the scaling factor using the data itself
scale = max(right) / max(left);

% Create the left bar by scaling the magnitude
barh(1:numel(left), -left * scale, 'r');

hold on
barh(1:numel(right), right, 'b')    

% Now alter the ticks.
xticks = get(gca, 'xtick')

% Get the current labels
labels = get(gca, 'xtickLabel'); 

if ischar(labels); 
    labels = cellstr(labels); 
end

% Figure out which ones we need to change
toscale = xticks < 0;

% Replace the text for the ones < 0
labels(toscale) = arrayfun(@(x)sprintf('%0.2f', x), ...
                           abs(xticks(toscale) / scale), 'uniformoutput', false);

% Update the tick locations and the labels
set(gca, 'xtick', xticks, 'xticklabel', labels)

% Now add a different label for each side of the x axis
xmax = max(get(gca, 'xlim'));
label(1) = text(xmax / 2, 0, 'Right Label');
label(2) = text(-xmax/ 2, 0, 'Left Label');

set(label, 'HorizontalAlignment', 'center', 'FontWeight', 'bold', 'FontSize', 15) 

Answer 2

以下是一个例子：

left = [.1; .5; .4; .6; .3]; % Scale 0-1, grows leftwards
right = [24; 17; 41; 25; 34]; % Scale 0-35, grows rightwards

ax_front = axes;
b_front = barh(right,0.35);
set(b_front,'facecolor',[0.2,0.4,1])
axis([-50,50,0,6])
axis off

ax_back = axes; 
b_back = barh(-left,0.35)
axis([-1,1,0,6])
set(b_back,'facecolor',[1,0.4,0.2])
set(gca, 'xtick', [-1:0.2:1])
set(gca, 'xticklabel', [[1:-0.2:0],[10:10:50]])
grid on

axes(ax_front) % bring back to front

结果：