How to center Matlab output image coordinate axes

PS: It is written on the front end. I haven’t used CSDN for a long time. Now that the company has joined the company, it has picked up the community culture again and carried forward the spirit of summarization and sharing.
This little point comes from a friend who is doing deep learning, outputting the function image of the representative function of deep learning, so I asked me to help find a solution.
First, the target image is given.

Here, MATLAB generally outputs the result as a frame line result display, and what is needed is a complete plane Cartesian coordinate system, as shown in .
First, write a drawing function shift_axis_to_origin This drawing function is the main implementation function.

function fig_handle = shift_axis_to_origin( axes_handle )
% function: 本函数目的是把 matlab 做的图坐标轴移到图形的原点
% input:
%   axes_handle: 原坐标轴句柄
% output:
%   fig_handle: 把坐标轴移动到原点的图像句柄

figure('Name','shift_axis_to_origin','NumberTitle','off')  % 创建一个新的窗口
fig_handle = copyobj( axes_handle , gcf );  % 拷贝图形到一个新的图像句柄

xL=xlim ;  % 获取x轴取值范围的最小、做大值：xL = [xlim_min,xlim_max]
yL=ylim ;  % 获取y轴取值范围的最小、做大值: yL = [ylim_min,ylim_max]

xt=get(gca,'xtick') ;  % 获取x轴的刻度
yt=get(gca,'ytick') ;  % 获取y轴的刻度

set(gca,'XTick',[],'XColor','w') ;  % 把底部的x轴坐标的刻度去掉并把底边设置为白色
set(gca,'YTick',[],'YColor','w') ;  % 把左边的y轴坐标的刻度去掉并把底边设置为白色

% 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] ;
%重新设定坐标轴的取值范围
set(gca,'xlim', xxL) ;
set(gca,'ylim', yyL) ;

pos = get(gca,'Position') ;  % 获取当前坐标轴的原点坐标和长宽：pos = [bottom,left,width,height]
box off;  % 上边和右边的边框去掉

% 计算原坐标轴到原点在x,y方向上的偏移量
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 ] ) ;  % 把原底部的x轴移动到x=0的位置上
xlim(xxL) ;  % 复制x轴的取值范围
box off ;
set(temp_1,'XTick',xt,'Color','None','YTick',[]) ; %把背景设为透明，并显示x轴刻度
set(temp_1,'YColor','w') ;  %把y轴去掉

temp_2 = axes( 'Position', pos + [ pos(3) * y_shift , 0 , -pos(3)* y_shift*0.99999 , 0 ] ) ;  % 把原左边的y轴移动到y=0的位置上
ylim(yyL) ;  % 复制y轴的取值范围
box off ;
set(temp_2,'YTick',yt,'Color','None','XTick',[]) ; % 把背景设为透明，并显示y轴刻度
set(temp_2,'XColor','w') ;  % 把x轴去掉

Base_pos = get(fig_handle,'Position') ;  %获取当前图像的左下角坐标和长宽：Base_pos = [bottom,left,width,height]
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

Then, write a main function and call the shift_axis_to_origin function of drawing in the main function

close all;clear;clc;

x = -5:0.01:5;
y = x.*tanh(log10(1+exp(x)));
figure;
plot(x,y);
legend('Mish');

shift_axis_to_origin( gca );

That's it.