??? Index exceeds matrix dimensions.

Hello everyone, I have given here my matlab program: ______________________________________________________________________________________________

function [ha hb] = func_get_h2(Elxoctet, Vlxoctet, q, rho)

abs_El0octet = abs(Elxoctet(2:end)); diff_E0 = abs(abs_El0octet - q);

% add +1 to compensate for the fact that we remove index 1 from Elxoctet diff_E0 = logical(diff_E0); index_E0 = find(diff_E0 == min(diff_E0)) + 1;

err_E0 = abs_El0octet(index_E0-1) - q; diff_E = abs_El0octet(index_E0) - q;

if (diff_E < 0) index2_E0 = index_E0 - 1; else index2_E0 = index_E0 + 1; end

if( (err_E0 > 0.0001) && (index_E0 < 2) ) h = zeros(length(rho),1); ha = zeros(length(rho),1); hb = zeros(length(rho),1); else ha = Vlxoctet(:,index_E0); hb = Vlxoctet(:,index2_E0); end

% if(err_E0 < 0.0001) % ha = Vlxoctet(:,index_E0); % hb = Vlxoctet(:,index2_E0); % else % ha = zeros(length(rho),1); % hb = zeros(length(rho),1); % end end _______________________________________________________________________________________________ when I executed the file, I got the error: ------------------------------------------------------------------------------------------------ ??? Index exceeds matrix dimensions.

Error in ==> func_get_h2 at 12 diff_E = abs_El0octet(index_E0) - q; ------------------------------------------------------------------------------------------------- Please help me to solve this problem and try to find out the possible error source. Thanks a lot to giving me your precious time. Thank you all of you.

Answer 1

[Mischa Kim]

Captain, it's hard to say based on the code you provide. In the command line

diff_E = abs_El0octet(index_E0) - q;

you are trying to access an element of array abs_El0octet that does not exist. E.g., this is like trying to access the 10th element of a vector that has only a total of 9 elements.

[Mischa Kim]

Just a thought. If the last element of diff_EO is the smallest one

index_E0 = find(diff_E0 == min(diff_E0)) + 1;

then index_E0 is greater (by one) than the number of elements in the vector(s). And that will cause the program to crash when trying to access that (n+1)st element.