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: divergenceTerm1D.m
    path of file: ./repos/FVTool/Calculus
    
    the code of the file until where you have to start completion: function RHSdiv = divergenceTerm1D(F)
% This function calculates the divergence of a field using its face

    
function RHSdiv = divergenceTerm1D(F)
% This function calculates the divergence of a field using its face
% average value
%
% SYNOPSIS:
%   RHSdiv = divergenceTerm1D(F)
%
% PARAMETERS:
%   F: Face Variable
%
% RETURNS:
%
%
% EXAMPLE:
%
% SEE ALSO:
%


% extract data from the mesh structure
Nx = F.domain.dims(1);
G = 1:Nx+2;
DX = F.domain.cellsize.x(2:end