how to plot two m.file in one plot

2 次查看（过去 30 天）
br
br 2024-2-18
评论： br 2024-2-19
i have two PDE each one i calculated in m.file, but i want to draw the output of first one as x, and the second as y
how can i do that

请先登录，再回答此问题。

采纳的回答

Dyuman Joshi
Dyuman Joshi 2024-2-18
Call both the PDEs in a new script/function and plot accordingly.
  7 个评论
显示 5更早的评论
Torsten
Torsten 2024-2-18
Ran in:
Please include the complete code with error message that demonstrates the problem you have.
The functions you provided don't suffice and some are duplicates.
kp0=140270;
Eap=43900;
kd0=0.355;
Ead=17400;
T=333;
kp=kp0*exp(-Eap/(8.314*T));
kd=kd0*exp(-Ead/(8.314*T));
m=2;
t=linspace(0,3600,1000);
u=linspace(0.036405,111.3494528,1000);
x=linspace(0,0.036405,1000);
x1=pdepe(m,@(x,t,u,DuDx)eqn111(x,t,u,DuDx,T),@initial111,@(xl,ul,xr,ur,t)bc111(xl,ul,xr,ur,t,kp,kd),u,t);
u1=pdepe(m,@(x,t,u,DuDx)eqn11(x,t,u,DuDx,T),@initial11,@(xl,ul,xr,ur,t)bc11(xl,ul,xr,ur,t,kp,kd),x,t);
t_indices = find(t >= 0 & t <= 3600);
figure
hold on
for j = t_indices
plot(x1(j,:),u(j,:));
hold off
end
xlabel('radius');
ylabel('concentration');
function [c,f,s]=eqn111(x,t,u,DuDx,T)
c=1;
f=(1.34*10^-7)*exp(-16000/(8.314.*T))*exp(-(0.57*1.225+0.43*1.005*0.524)/(0.57*2.91*(-8.675+T)+0.43*0.5*(-205+T)))*DuDx;
s=0;
end
%----------------------------------------------------------------------------------------
function value=initial11(x)
value=0;
end
%-----------------------------------------------------------------------------
function [c,f,s]=eqn11(x,t,u,DuDx,T)
c=1;
f=(1.34*10^-6)*exp(-16000/(8.314.*T))*exp(-(0.57*1.225+0.43*1.005*0.524)/(0.57*2.91*(-8.675+T)+0.43*0.5*(-205+T)))*DuDx;
s=0;
end
%------------------------------------------------------------------------------
function value=initial11(u)
Function 'initial11' has already been declared within this scope.
value=0.036405;
end

请先登录，再进行评论。

更多回答（1 个）

Sulaymon Eshkabilov
Ran in:
use plot(x, y), e.g.:
x = [-5:5;2*(-5:5); 3*(-5:5)];
y = [3*x.^2+3*x-3; -5*x.^2+5*x-15; -2*x.^2-3*x-13;];
plot(x(1,:),y(1,:), 'ro-', x(2,:),y(2,:), 'kp:', x(3,:),y(3,:), 'b--', 'LineWidth', 2)
grid on
xlabel ('x')
ylabel ("y(x)")
legend('Set 1', 'Set 2', 'Set 3', 'Location', 'Best')
  1 个评论
br
br 2024-2-18
thanks a lot, but each parameter x and u are in differant m.file how to combine them?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Eigenvalue Problems 的更多信息

标签

产品


版本

R2023b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by