how to fix this error 'Index exceeds array dimensions. Index value 3 exceeds valid range [1-2] for array 'a'. '
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CHEW Yen LI
le 4 Mai 2021
Commenté : CHEW Yen LI
le 4 Mai 2021
HI guys, I have some problem during running the code below and it give me the error
- Index exceeds array dimensions. Index value 3 exceeds valid range [1-2] for array 'a'. Error in 'TEST/TEST' (line 18) if a(i)> 0
This code is the code for computiong the parameter k for the scalar reference governor. and Hx and Hv is the maximal admissible output sets(MAS) with the matrices A,B,C,D hope can get some help to fix this code form your all.
function v = SRG_new(v_previous, r)
A=[0 1;-275.5 -21.22];
B=[0;1];
C=[11.02 275.5];
D=0;
I=eye(2);
Hx=(C*A);
Hv= C*((I-A)*((I-A)^-1)*B+D);
s=350; %s=max_output
a=Hx*(r-v_previous);
b=s-Hx-Hv*v_previous;
k=1;
for i=1:100
if a(i)> 0
k=min(k, b(i)/a(i));
end
end
k=max(k,0);
v=v_previous + k*(r-v_previous);
end
3 commentaires
Walter Roberson
le 4 Mai 2021
That does not look like a MATLAB error message. An Octave error message maybe.
Réponse acceptée
Walter Roberson
le 4 Mai 2021
Replace the loop with
mask = a > 0;
a = a(mask);
b = b(mask);
if isempty(a)
k = 1;
else
k = max(0, min(a./b));
end
3 commentaires
Walter Roberson
le 4 Mai 2021
Okay then, change your code from
k=1;
for i=1:100
if a(i)> 0
k=min(k, b(i)/a(i));
end
end
k=max(k,0);
to
k=1;
for i=1:length(a)
if a(i)> 0
k=min(k, b(i)/a(i));
end
end
k=max(k,0);
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