Subscript Error Plz help

Pk is a 1*5 , and LandaMean is 1*37 matrice

b=1
m=6

for k=1:(n-(2*b)-m+1);
    Pk = LandaMean(k+1:k+m-1);

for i=k+1:k+m-1

    if sum(abs(Pk(i)-LandaMean(k)))<= (2*s);

        LandaU =(1/m)*sum(LandaMean(k:k+m-1));

        break
    else

    end    
  end
  end

But I get this error:

Subscript indices must either be real positive integers or logicals.

Error in TailDep (line 50)

    if sum(abs(Pk(i)-LandaMean(k)))<= (2*s);

Thank you

[Fred]

Thank you, I realized that I had used sum in other lines as a parameter so it was the making problem :)

Answer 1

[Razvan]

Just look at line 50 and what vectors are there. Probably there is something like

vector(negative_number)

So check why the index is negative...

[Fred]

Thank you

Answer 2

[Image Analyst]

What is n and s? Whatever they are, they make either i or k negative or zero.

I guessed for n and s and ran this code and had no error whatsoever:

Pk = rand(1, 5);
LandaMean = rand(1, 37);
b=1;
m=6
n = 9 % Total guess
s = 10 % Total guess
for k=1:(n-(2*b)-m+1); 
  Pk = LandaMean(k+1:k+m-1);  
  for i=k+1:k+m-1    
    if sum(abs(Pk(i)-LandaMean(k)))<= (2*s);      
      LandaU =(1/m)*sum(LandaMean(k:k+m-1));      
      break;
    else
      
    end
  end
end

Do you know how to step through code with the debugger to inspect variables?

[Fred]

Thanks, in my workspace n=40, s=0.1818

[Fred]

Actually I found where is the problem but I don't know what should I do? the inside of sum becomes around 0.15 and it assumes that 0.15 is an index for sum!! but sum is a function here!

[Walter Roberson]

Are you sure that you did not accidentally create a variable with the name "sum" ? Check with

whos sum