not getting the output

my code is running but i am unable to obtain output variables value(A nad B).This is my code

m = load('c12.5_17day_1a.TXT');

u = cumsum (m(:,1));

new = [m u];

N = new(:,20);

for i=1:length(N)

if(N<50)

j=1;

elseif(N>50)

j=50;

A = (1/j)* movesum(m(:,18),m(:,1),m(:,j));

end

if(N<=50)

k=1;

elseif((51<= N)&(N <=200))

k=N-30;

elseif((201<= N)&(N<=500))

k=0.85*N;

elseif(N >=501)

k = N-75;

B = ((N(i)/(N(i)-k))) * (movesum(m(:,18),m(:,k+1),m(:,N(i))))/(movesum(m(:,18),m(:,1),m(:,N(i)))) ;

end

end

Answer 1

[Walter Roberson]

N = new(:,20);

N is a vector

for i=1:length(N)
  if(N<50)

You are testing a vector. You should be testing N(i)

You should be writing to A(i) and B(i)