You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sw_cndr.m
    path of file: ./repos/tracacode/1911-COAWST/script/mfiles/rutgers/seawater
    
    the code of the file until where you have to start completion: function R = sw_cndr(S,T,P)

% SW_CNDR    Conductivity ratio   R = C(S,T,P)/C(35,15(IPTS-68),0)
%=========================================================================
% SW_CNDR  $Id: sw_cndr.m 330 2009-03-10 05:57:42Z arango $
%          Copyright (C) CSIRO, Phil Morgan 1993.
%
% USAGE:  cndr = sw_cndr(S,T,P)
%
% DESCRIPTION:

    
function R = sw_cndr(S,T,P)

% SW_CNDR    Conductivity ratio   R = C(S,T,P)/C(35,15(IPTS-68),0)
%=========================================================================
% SW_CNDR  $Id: sw_cndr.m 330 2009-03-10 05:57:42Z arango $
%          Copyright (C) CSIRO, Phil Morgan 1993.
%
% USAGE:  cndr = sw_cndr(S,T,P)
%
% DESCRIPTION:
%   Calculates conductivity ratio from S,T,P.
%
% INPUT:  (all must have same dimensions)
%   S = salinity    [psu      (PSS-78) ]
%   T = temperature [degree C (ITS-90)]
%   P = pressure    [db]
%       (P may have dims 1x1, mx1, 1xn or mxn for S(mxn) )
%
% OUTPUT:
%   cndr = Conductivity ratio     R =  C(S,T,P)/C(35,15(IPTS-68),0) [no units]
%
% AUTHOR:  Phil Morgan 93-04-21, Lindsay Pend