Matlab drawing, x-axis and y-axis scale non-uniform control, draw a good-looking picture

1. Learning content:

Use matlab to draw pictures, control the x-axis and y-axis scale to display related codes

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2. Related codes:

1. The viewpoint of the coordinate axis (viewpoint):

1、坐标轴的视点(viewpoint)：从哪个方向看整个坐标系统，这决定了坐标轴的方向和位置，通过view函数实现视点的设置；

view([z y ])：(将坐标系统想象为一座房子，而自己是个会飞的天使，最初你在房子的北，海拔角度为0的位置，这是时你的视角是view[0 0]，之后可以根据需要设置z和y的值，分别是绕房子转动的方向，和沿空间轴向上妃的高度)z表示视角沿z轴(正方向)旋转的角度，y表示视角沿y轴(水平面)旋转的角度

2. Coordinate axis display, close, style

axis off; % 去掉坐标轴

axis tight; % 紧坐标轴

axis equal; % 等比坐标轴

axis([-0.1, 8.1, -1.1, 1.1]); % 坐标轴的显示范围

% gca: gca, h=figure(...);

set(gca, 'XLim',[3 40]); % X轴的数据显示范围

set(gca, 'XTick',[-3.14,0,3.14] ); % X轴的记号点

set(gca, 'XTicklabel',{
    
    '-pi','0','pi'}); % X轴的记号

set(gca, 'XTick', []); % 清除X轴的记号点

set(gca, 'XGrid','on'); % X轴的网格

set(gca, 'XDir','reverse'); % 逆转X轴

set(gca, 'XColor','red'); % X轴的颜色

3. Set the x and y axis positions

set(gca,'YAxisLocation','right') % y轴的刻度设置到右侧

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