Hello. Problem using the Size function. Throws out an error during its first use. Code Fragment:

sz = length (group3Items);
DISP ('We work with 3 sets' elements');
% Add reliability in 5 column
For i = 1: sz
  Group3Items (I, 5) = Group3Items (I, 4) / Group1Items (Group3Items (I, 1), 2) * 100;
end;
% Remove with low reliability
Ctr = 0;
While True.
  For i = 1: sz
    If (Group3Items (I, 5) & LT; Minconf)
      CTR = CTR + 1;
      Group3Items (I, :) = [];
      SZ = Size (Group3Items, 1);
      Break;
    end;
  end;
  if i == sz
    Break;
  end;
end;

Error literally:

??? Subscript Indices Must Either BE Real Positive Integers OR
Logicals.

error in == & gt; Untitled AT 226

SZ = Size (Group3Items, 1);

How can I fix this error?

Answer 1, Authority 100%

I as if I already understood how you could get around this problem. I decided to find the number of lines of the matrix so:

sz = length (group3Items (: 1));

And everything worked.