MYSTERY matlab Error - Index exceeds matrix dimensions - can't track it!

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void22
void22 2018-6-21
编辑： per isakson 2018-6-21
hi everyone , i have this silly error but i'm not able to fix it , since i don't see any index exceeding the matrix dimensions .
function [ Hclean,Bclean , EnergyDissipation ,InnerMagnetization ] = BHavg( B,H )
for t=1:size(H,1)
InnerB=[];
InnerBnegative=[];
ZeroIndexTemp = find(abs(H(t,:))-0.03<0.005);
for p =1:size(ZeroIndexTemp,2)
if B(t,ZeroIndexTemp(p))>0
InnerB=[InnerB,B(t,ZeroIndexTemp(p))];
else
InnerBnegative=[InnerBnegative ,B(t,ZeroIndexTemp(p))];
end
end
InnerMagnetization(t) = mean(InnerB);
ErrorManetization(t) = abs(InnerMagnetization(t) + mean(InnerBnegative));
ZeroIndex =[];
for i =1:size(ZeroIndexTemp,2)-1
if ZeroIndexTemp(i+1)-ZeroIndexTemp(i)>10
ZeroIndex=[ZeroIndex,ZeroIndexTemp(i)];
end
end
loopHTemp={};
loopH=[];
loopB=[];
loopBTemp={};
for j = 1:(size(ZeroIndex,2)-2)/2
loopHTemp{j}=H(ZeroIndex(j*2):ZeroIndex(j*2+2));
loopBTemp{j}=B(ZeroIndex(j*2):ZeroIndex(j*2+2));
end
VsizeCount =[];
for k=1:size(loopHTemp,2)
VsizeCount=[VsizeCount,size(loopHTemp{k},2)];
end
minListSize = min(VsizeCount);
for m=1:size(loopHTemp,2)
loopHTemp{m}(minListSize+1:end)=[];
loopH(m,:)=loopHTemp{m};
loopBTemp{m}(minListSize+1:end)=[];
loopB(m,:)=loopBTemp{m};
end
A=[];
B=[];
for y=1:size(loopH,1)
A=[A;loopH(y,:)];
B=[B;loopB(y,:)];
end
if size(loopH,1)>1
Hclean(t,:) = mean(A);
Bclean(t,:) = mean(B);
else
Hclean(t,:) = loopH(:,i);
Bclean(t,:) = loopB(:,i);
end
EnergyDissipation(t) = polyarea(Hclean(t,:),Bclean(t,:));
if EnergyDissipation(t) >5
figure
fill(Hclean(t,:),Bclean(t,:),'b')
end
end
end
i added the entire code since maybe it's not related to the error message matlab shows me , but this is what it shows
Index exceeds matrix dimensions.
Error in BHavg (line 8)
if B(t,ZeroIndexTemp(p))>0
please help ! (:
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回答（1 个）

per isakson
per isakson 2018-6-21
编辑：per isakson 2018-6-21
  • B is overwritten at line 43 and the following loop.
  • In the second and the following iterations of the outer loop, t>=2, the size of B may be so small that B(t,ZeroIndexTemp(p)) causes the error. "Index exceeds matrix dimensions."

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