function new_fig_handle = shift_axis_to_origin( fig_handle )

% 本函数目的是把 matlab 做的图坐标轴移到图形的中间部分去(与数学的做图习惯一致)

% 2008.10.10 in pku

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figure(\'Name\',\'shift_axis_to_origin\',\'NumberTitle\',\'off\')   % Create a new figure

% 拷贝图形到一个新的窗口

new_fig_handle = copyobj( fig_handle , gcf );

xL=xlim ;

yL=ylim ;

xt=get(gca,\'xtick\') ;

yt=get(gca,\'ytick\') ;

set(gca,\'XTick\',[],\'XColor\',\'w\') ;

set(gca,\'YTick\',[],\'YColor\',\'w\') ;

% 把 x 和 y 坐标轴的两个方向各延长 10% （为了视觉上好看）

extend_x = ( xL(2)-xL(1) ) * 0.1 ;

extend_y = ( yL(2)-yL(1) ) * 0.1 ;

xxL = xL + [ -extend_x extend_x] ;

yyL = yL + [ -extend_y extend_y] ;

set(gca,\'xlim\', xxL) ;

set(gca,\'ylim\', yyL) ;

pos = get(gca,\'Position\') ;

box off;

x_shift = abs( yyL(1)/(yyL(2)-yyL(1)) ) ;

y_shift = abs( xxL(1)/(xxL(2)-xxL(1)) ) ;

temp_1 = axes( \'Position\', pos + [ 0 , pos(4) * x_shift , 0 , - pos(4)* x_shift*0.99999 ] ) ;

xlim(xxL) ;

box off ;

set(temp_1,\'XTick\',xt,\'Color\',\'None\',\'YTick\',[]) ;

set(temp_1,\'YColor\',\'w\') ;

temp_2 = axes( \'Position\', pos + [ pos(3) * y_shift , 0 , -pos(3)* y_shift*0.99999 , 0 ] ) ;

ylim(yyL) ;

box off ;

set(temp_2,\'YTick\',yt,\'Color\',\'None\',\'XTick\',[]) ;

set(temp_2,\'XColor\',\'w\') ;

Base_pos = get(new_fig_handle,\'Position\') ;

arrow_pos_in_x_dircetion = Base_pos(2) - Base_pos(4) * yyL(1)/(yyL(2)-yyL(1)) ;

arrow_pos_in_y_dircetion = Base_pos(1) - Base_pos(3) * xxL(1)/(xxL(2)-xxL(1)) ;

annotation(\'arrow\',[Base_pos(1) , Base_pos(1)+Base_pos(3)] , [arrow_pos_in_x_dircetion , arrow_pos_in_x_dircetion ] , \'Color\',\'k\');

annotation(\'arrow\',[arrow_pos_in_y_dircetion , arrow_pos_in_y_dircetion ] , [Base_pos(2) , Base_pos(2)+Base_pos(4)] , \'Color\',\'k\');

end

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% 本程序目的是把 matlab 做的图坐标轴移到图形的中间部分去(与数学的做图习惯一致)
% 2008.10.08
%
clc;clear;close all;
t=linspace(-2,8,100);
a1=axes;
plot(t,cos(t));
% xt=get(gca,\'xtick\');
% set(gca,\'XTick\',[],\'XColor\',\'w\');
% xL=xlim;
% p=get(gca,\'Position\');
% box off;
% a2=axes(\'Position\',p+[0,p(4)/2,0,-p(4)/2]);
% xlim(xL);box off;
% set(gca,\'XTick\',xt,\'Color\',\'None\',\'YTick\',[]);
new_fig_handle = shift_axis_to_origin( gca ) ;