Plot 3D with mesh points known
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Thanasis Hou
el 25 de Abr. de 2017
Respondida: KSSV
el 26 de Abr. de 2017
Hello,
I am encountered a problem with plotting. I solved a linear system(9x9) of equations (x = inv(A)*b). I have a 5x5 grid over 0<x<4 and 0<y<4 wiht boundary conditions. I want to depict the results in 3D. The solution gives (interior points)
x = [u2,2; u3,2; u4,2; u2,3; u3,3; u4,3; u2,4; u3,4; u4,4]
In addition, for x = 0 I have the BC points, u1,4 = u1,3 = u1,2 = 80
for x = 4, u5,4 = u5,3 = u5,2 = 0
for y = 0, u2,1 = u3,1 = u4,1 = 20
for y = 4, u2,5 = u3,5 = u4,5 = 180.
How can I make a 3D plot (surface) with these?
2 comentarios
KSSV
el 26 de Abr. de 2017
Your given data is quite confusing. Note that surf plots 3D surface. Read about surf
Respuesta aceptada
KSSV
el 26 de Abr. de 2017
x = 0:4 ;
y = 0:4 ;
[X,Y] = meshgrid(x,y) ;
U = rand(size(X)) ; % you have to find the interior points, I have taken random
U(:,1) = 80 ;
U(1,:) = 180 ;
U(:,end) = 0 ;
U(end,:) = 20 ;
surf(X,Y,U)
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