Getting an "index out of bounds error" in my Matlab program. Help.

ex(1)=lx/J      %%first i term in ex matrix
ex(2)=mx/J      %%second j term in ex matrix
ex(3)=nx/J      %%third k term in ex matrix

for i=1:8
    for j=1:27
        N_matrix(i,j)=0;
    end
end

for i=1:9

       N_matrix(1,i)=N(rem(i-1,3)+1)*ex(i)/3;(ERROR HERE)
  end

Attempted to access ex(4); index out of bounds because numel(ex)=3.

Error in practisee2 (line 227)
     N_matrix(1,i)=N(rem(i-1,3)+1)*ex(i)/3

[KSSV]

@ Virajan Verma It is not fair to ask every step a question in forum. I suggest/ advice you to read basic tutorials of MATLAB which is very easy

Answer 1

[KSSV]

YOur ex has only three elements..you are trying to access i = 4. So error.

[KSSV]

Replace these lines:

for i=1:8
    for j=1:27
        N_matrix(i,j)=0;
    end
end

by simply:

N_matrix = zeros(8,27) ;