area between three curves

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mukesh bisht 2021-11-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1585299-area-between-three-curves

评论： mukesh bisht 2021-11-13

Hi, I want to color the area between the intersection of three curves. Please suggest a way

Code:

T1 = 180:0.1:270;

x1 = 3*cosd(T1); y1 = 3*sind(T1);

T2 = theta_4s2:0.001:theta_4f2;

c1 = 4.3123; c2 = -50.2708; c3 = 193.7277; c4 = -243.8411;

r_6 = c1*T2.^3 + c2*T2.^2 + c3*T2 + c4;

x2 = 1.998 + r_6.*cos(T2); y2 = -0.8840 + r_6.*sin(T2);

x0 = 1.8977; y0 = 2.3235; vr = 4.0678;

beta = atan(y0/x0);

x3 = s2(1,1):0.001:x_t; y3 = y0 + (x0-x3)*cot(beta) - (9.81*(x0-x3).^2)./(2*(vr*sin(beta))^2);

pgon1 = polyshape(x1,y1);

pgon2 = polyshape(x2,y2);

pgon3 = polyshape(x3,y3);

figure (1)

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

hold on

plot (intersect(intersect(pgon3,pgon4), pgon3,'EdgeColor','none')

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Star Strider 2021-11-12

在 MATLAB Online 中打开

... still more problems ...

T2 = 3.3620:0.001:3.9045;
T1 = 180:0.1:270;
x1 = 3*cosd(T1); y1 = 3*sind(T1); 
T2 = 3.3620:0.001:3.9045;
c1 = 4.3123; c2 = -50.2708; c3 = 193.7277; c4 = -243.8411;
r_6 = c1*T2.^3 + c2*T2.^2 + c3*T2 + c4;
x2 = 1.998 + r_6.*cos(T2); y2 = -0.8840 + r_6.*sin(T2);   
x0 = 1.8977; y0 = 2.3235; vr = 4.0678;
beta = atan(y0/x0);
x3 = s2(1,1):0.001:x_t; y3 = y0 + (x0-x3)*cot(beta) - (9.81*(x0-x3).^2)./(2*(vr*sin(beta))^2);
Unrecognized function or variable 's2'.
pgon1 = polyshape(x1,y1);         
pgon2 = polyshape(x2,y2);          
pgon3 = polyshape(x3,y3);
figure (1)
plot(x1,y1,x2,y2,x3,y3)
hold on
plot (intersect(intersect(pgon3,pgon4)), pgon3,'EdgeColor','none')