如何在同一个无花果Matlab中制作两个条形

I want to make two bars in the same fig in matlab. Now, I have two separate bar charts, what I want to do is combining them in one chart but with different colors (eg red and blue) to differentiate between the two barcharts. This is the two barcharts appearing:

what I want to do is something like this:

下面是我正在使用的代码，如果有人可以帮助我。

load('x640_Sensor_Lights_On_1000mm-pgms.mat');
uu=unique(n);
nn=histc(n, uu);
h=figure; bar(uu,nn/numel(n));
print(h, '-dpdf', 'x1000');
saveas(h,'x1000','fig');

load('k640_Sensor_Lights_On_1000mm-pgms.mat');
uu=unique(n);
nn=histc(n, uu);
h=figure; bar(uu,nn/numel(n));
print(h, '-dpdf', 'k1000');
saveas(h,'k1000','fig');

您可以查看以下示例bar()特别是关于酒吧风格 http://www.mathworks.co.uk/help/matlab/ref/bar.html#bthxce9: