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: hinton.m
    path of file: ./repos/bnt/netlab3.3
    
    the code of the file until where you have to start completion: function h = hinton(w);
%HINTON	Plot Hinton diagram for a weight matrix.
%
%	Description
%
%	HINTON(W) takes a matrix W and plots the Hinton diagram.
%
%	H = HINTON(NET) also returns the figure handle H which can be used,
%	for instance, to delete the  figure when it is no longer needed.
%
%	To print the figure correctly in black and white, you should call
%	SET(H, 'INVERTHARDCOPY', 'OFF') before printing.
%
%	See also
%	DEMHINT, HINTMAT, MLPHINT
%

%	Copyright (c) Ian T Nabney (1996-2001)

% Set scale to be up to 0.9 of maximum absolute weight value, where scale
% defined so that area of box proportional to weight value.

% Use no more than 640x480 pixels
xmax = 640; ymax = 480;

% Offset bottom left hand corner
x01 = 40; y01 = 40;
x02 = 80; y02 = 80;

% Need to allow 5 pixels border for window frame: but 30 at top
border = 5;
top_border = 30;

ymax = ymax - top_border;

    
function h = hinton(w);
%HINTON	Plot Hinton diagram for a weight matrix.
%
%	Description
%
%	HINTON(W) takes a matrix W and plots the Hinton diagram.
%
%	H = HINTON(NET) also returns the figure handle H which can be used,
%	for instance, to delete the  figure when it is no longer needed.
%
%	To print the figure correctly in black and white, you should call
%	SET(H, 'INVERTHARDCOPY', 'OFF') before printing.
%
%	See also
%	DEMHINT, HINTMAT, MLPHINT
%

%	Copyright (c) Ian T Nabney (1996-2001)

% Set scale to be up to 0.9 of maximum absolute weight value, where scale
% defined so that area of box proportional to weight value.

% Use no more than 640x480 pixels
xmax = 640; ymax = 480;

% Offset bottom left hand corner
x01 = 40; y01 = 40;
x02 = 80; y02 = 80;

% Need to allow 5 pixels border for window frame: but 30 at top
border = 5;
top_border = 30;

ymax = ymax - top_border;
xmax = xmax - border;

% First layer

[xvals, yvals, color] = hintmat(w);
% Try to preserve aspect ratio approximately
if (8*size(w, 1) < 6*size(w, 2))
  delx = xmax; dely = xmax*size(w, 1)/(size(w, 2));
else
  delx = ymax*size(w, 2)/size(w, 1); dely = ymax;
end