matlab如何添加图像阴影

1. rectangle

rectangle('Position',[100,300,70,50],'Curvature',[0,0],'LineWidth',2,'LineStyle','--','EdgeColor','r')

% rectangle('Position',[x,y,宽,高],'Curvature',[x曲率,y曲率],'LineWidth',‘线宽,'LineStyle','线型','EdgeColor','线色')

2. patch

H_pa = patch([0.02,0.02,2,2],[0.01, 10,10,0.01],[.8 .8 .8])

% patch([Xleft, Xleft, Xright, Xright], [Ydown, Yup, Yup, Ydown],[阴影颜色])

set(H_pa,'EdgeColor',[.8 .8 .8],'EdgeAlpha',0.5,'FaceAlpha',0.5)

%set(H_pa,'EdgeColor',[边框颜色],'EdgeAlpha',边框透明度,'FaceAlpha',阴影透明度)

qujian=inputdlg({'输入a','输入b'})%如 1 3

F1=str2double(qujian{1})

F2=str2double(qujian{2})

x=linspace(-5,5)

y=normpdf(x,0,1)

x1=F1:0.01:F2

y1=normpdf(x1,0,1)

figure('color','w')

plot(x,y,'k')

xlabel('标准正态分布函数')

hold on

area(x1,y1)

hold off

按上面语句试试

程序改成如下：

clear allclc

[x1,y1]=solve('x=0','x*y-2*x-2*y+4+x*y*(-0.5)=0')%

[x2,y2]=solve('x=0','y=0')%

[x3,y3]=solve('x*y-2*x-2*y+4+x*y*(-0.5)=0','y=0') %

plot(x1,y1,'bo',x2,y2,'bo',x3,y3,'bo')

hold on

X=[x1,x2,x3,x1]

Y=[y1,y2,y3,y1]

h=fill(X,Y,'c')

hold on

x=0:0.001:2

 y=(2*x-4)./(x-0.5*x-2)

h1= fill(x,y,'c')

 axis square

 axis([0 2 0 2])

上图是程序得的结果。中间多了两根黑线。我只能手动编辑能去掉，如下图：

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