How to color RED to the lower portion of the curve

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Atom 2013-4-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72602-how-to-color-red-to-the-lower-portion-of-the-curve

How to color RED to the lower portion of the curve y=x^2

x = 1 : 0.1 : 10;
y = x.^2;
plot(x,y)
axis([1 10 0 100])

采纳的回答

Kye Taylor 2013-4-18

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72602-how-to-color-red-to-the-lower-portion-of-the-curve#answer_82705

在 MATLAB Online 中打开

Replace the

plot(x,y)

command with

area(x,y,'FaceColor',[1 0 0])

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Atom 2013-4-18

Please suggest about the meaning of patch([x,0],[y,100],'b').

Kye Taylor 2013-4-19

the first two inputs to patch can be thought of as points that define vertices of some polygon. the vectors x and y are the lower parts of that polygon. By adding a point (0,100) to the set of vertices, we get the top left corner of the polygon. Without that vertex, the behavior was as you said above, only the "upper portion" was colored instead of the "whole upper part".

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