Index of element to remove exceeds matrix dimensions.ERROR

global ASOption 
Nodes(:,1)=[];
NewNodes(1,:)=[]; 
Distances=zeros(ASOption.n,ASOption.n);
PI=3.141592
for i=2:ASOption.n
    for j=1:i
        if(i==j)    
            continue;
        else
      deg1=round(Nodes(i,:));
      minimum1=(Nodes(i,:))-deg;
      NewNodes(i,:)=PI*(deg1+5.0*minimum1/3.0)/180.0;
      deg2=round(Nodes(j,:));
      minimum2=(Nodes(j,:))-deg2;
      NewNodes(j,:)=PI*(deg2+5.0*minimum2/3.0)/180.0;
          dij=stdist(NewNodes(i,:),NewNodes(j,:));
            Distances(i,j)=dij
            Distances(j,i)=Distances(i,j);  
        end
    end
end

I am trying to caculate geographical distance between nodes gives in the node matrix. but i get ??? Index of element to remove exceeds matrix dimensions.ERROR.....please help...

[Walter Roberson]

Which line does it give that message for?

The only place you remove elements are on the second and third line, and the only way the elements you are asking to remove there might not exist is if the matrix is already empty (in which case one or both of its dimensions might be 0, so index 1 might not exist.)

Answer 1

[Fangjun Jiang]

Run the code below you will see the exact error message. It's because variable Nodes and NewNodes didn't even exist before you were trying to remove their elements.

clear all;
Nodes(:,1)=[];
NewNodes(1,:)=[];

???  Index of element to remove exceeds matrix dimensions.

Nodes seems to be an input of the script above. You need to provide value for it.

[bir giz]

input_signals(1:5,:) = [] ??? Index of element to remove exceeds matrix dimensions.