MATLAB-xy曲线下的条纹区域(弯矩分布) [英] MATLAB - striped area under the xy curve (bending moment distribution)

问题描述

我要实现的是一个经典的弯矩分布图，该图可能看起来像这样:

what I want to achieve is a classical bending moment distribution plot that may look something like that:

我尝试使用面积图，xy图和条形图，最后一个图是最接近我需要的图-但这仍然不是我可以接受的.我可以使用任意形式的数据.

I tried to use area, xy, and bar plot and the last one is the closest to what I need - but it's still not what I can accept. I can use data in arbitrary form.

推荐答案

而 Daniel的答案更为笼统，可以用于倾斜的条纹，这是使用stem而不使用标记和基线的简单解决方案:

While Daniel's answer is more general, and can be used for slanted stripes, here's a simpler solution using stem without markers and baseline:

x1 = -3;
x2 = 2;
upfun = @(x) -1/10*(x-x1).*(x-x2);
downfun = @(x) 1/5*(x-x1).*(x-x2);

x_dense = linspace(x1,x2,100);
x_sparse = linspace(x1,x2,20);

%// plot outline
plot(x_dense,upfun(x_dense),'b-',x_dense,downfun(x_dense),'b-');
hold on;
%// plot stripes
stem(x_sparse,upfun(x_sparse),'b','marker','none','showbaseline','off');
stem(x_sparse,downfun(x_sparse),'b','marker','none','showbaseline','off');

结果:

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