Plot error: Index exceeds the number of array elements (104).

Question

Jamie Al 2021-5-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/822645-plot-error-index-exceeds-the-number-of-array-elements-104

编辑： KSSV 2021-5-6

I am having the following error with plotting :

Index exceeds the number of array elements (104).
Error in MUSCL_main (line 144)
plot(Ini_x,history(h).U_Euler(1,:))

The code:

Nodes = 120;
cells = Nodes-1;
Ghost = 2;
Ini_x = Cells+2*Ghost;
U_Euler = zeros(8,Ini_x);
end_time = 6.0;
t= 0;
[dt_E] = DT(U_Euler, CFL, dx, 0);
n=0;
h=1;
while (t < end_time)
   for k = 1:4
    [U_Le, U_Re] = MUSCL(U_Le, U_Re , U_RK_Euler);
    
    V_EulerL = switch_Con2Prim(U_Le, Gamma, mu_0, 0);
    
   [Flux_E] = computeFluxes(Flux_E, V_EulerL, V_EulerR, U_Le,U_Re,dt_E,dx, 0);
   
   [Res_E] = Residual(Flux_E, dx, dy, dz, Res_E);
   
   [U_RKe] = RK4( U_Euler, dx, dy, dz, dt_E, k);
   
    U_RK_Euler = Boundary_periodic(U_RKe);
   end
    U_Euler = U_RK_Euler;
    t = t+dt_E;
    if mod(n,10)== 0
        history(h).U_Euler = U_Euler;
        h=h+1;
    end
       n=n+1;  
end
plot(Ini_x,history(h).U_Euler(1,:)) % error 

I am trying to plot the data saved in the "history"

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KSSV 2021-5-6

The error is clear, you are trying to extract more number of elements then present in the array. Check the dimensions of each array in the data used for plot.

Jamie Al 2021-5-6