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

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 ! (:

[per isakson]

Set

dbstop if error

and try again

[void22]

what do you mean? to type it in command window?

[void22]

i guessed correctly and typed it in the command window then tried again , this time the code went through the entire code succesfully but still this one run of the loop remained empty , any idea what could cause it ?

[per isakson]

What values of the input arguments, B and H do you use?

[void22]

B and H are 100x2500 matrixes

[per isakson]

"i guessed correctly" You shouldn't guess, but consult the documentation!

Answer 1

[per isakson]

• 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."