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Why i am getting blank graph? Can someone help me to figure out error in my code.

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Sharqa
Sharqa 2024-7-12
评论： Sharqa 2024-8-16
function is_exam3
L=0.01;
M=0;
q=0.5;
a=0.03;
Pr=0.1;
b=0.2;
p=0.1;
m=0.1;
e=1.0;
H=0.1;
E=0.1;
o=0.1;
n=0.1;
B=0.1;
l=0.5;
q=0.1;
K=0.1;
S=0.3;
sol = bvpinit(linspace(0,1,100), [0 0 0 0 0 0]);
sol1 = bvp4c(@bvpexam3, @bcexam3, sol);
x = sol1.x;
y = sol1.y;
plot(x, y(2, :), 'LineWidth', 2)
end
function ysol = bvpexam3(x,y)
hold on
function res = bcexam3(y0, yinf)
S=0.3; L=0.01;b=0.2 ;K=0.1 ;B=0.1;
res = [y0(1); y0(2)-S+L*b*y0(3); K*y0(6)+B(1-y0(5)); yinf(2)-1;yinf(3); yinf(5)];
yy1 =((2*P)/q*(m+1)*y(1))*((b/p)*y(4)+(2*m/m+1)*(1-y(2)^2)+(q/p)*((3*m-1)*y(2)*y(4)+(3*m-1/2)*(y(3)^2)+(m-1)*y(3)*y(4))+M*exp^(-a)+y(1)*y(3));
yy2 =-((q*l)-r)/(K+n*(1+y(5))*((o-1)^3))*((3*n*(y(6)^2)*(o-1)/((q*l)-r)+(1+y(5)*(o-1)^2)+(2*Pr*H*y(5))/((q*l)-r)*(m+1)+Pr*y(1)*y(6)));
ysol = [y(2);y(3);y(4);yy1;y(6);yy2];
end
end

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采纳的回答

Torsten
Torsten 2024-7-12
Ran in:
is_exam3()
function is_exam3
L=0.01;
M=0;
q=0.5;
a=0.03;
Pr=0.1;
b=0.2;
p=0.1;
m=0.1;
e=1.0;
H=0.1;
E=0.1;
o=0.1;
n=0.1;
B=0.1;
l=0.5;
q=0.1;
K=0.1;
S=0.3;
P=1;
r=1;
sol = bvpinit(linspace(0,1,100), [0 0 0 0 0 0]);
sol1 = bvp4c(@bvpexam3, @bcexam3, sol);
x = sol1.x;
y = sol1.y;
plot(x, y(2, :), 'LineWidth', 2)
function ysol = bvpexam3(x,y)
yy1 =((2*P)/q*(m+1)*y(1))*((b/p)*y(4)+(2*m/m+1)*(1-y(2)^2)+(q/p)*((3*m-1)*y(2)*y(4)+(3*m-1/2)*(y(3)^2)+(m-1)*y(3)*y(4))+M*exp(-a)+y(1)*y(3));
yy2 =-((q*l)-r)/(K+n*(1+y(5))*((o-1)^3))*((3*n*(y(6)^2)*(o-1)/((q*l)-r)+(1+y(5)*(o-1)^2)+(2*Pr*H*y(5))/((q*l)-r)*(m+1)+Pr*y(1)*y(6)));
ysol = [y(2);y(3);y(4);yy1;y(6);yy2];
end
function res = bcexam3(y0, yinf)
res = [y0(1);y0(2)-S+L*b*y0(3);K*y0(6)+B*(1-y0(5));yinf(2)-1;yinf(3);yinf(5)];
end
end

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