Matlab绘图添加直角坐标轴
绘制y=x^2，并添加直角坐标轴。
clear;clc;close all %% 绘制方程 x = -10:0.01:10; figure; y = x.^2-30; plot(x,y,\'k\',\'linewidth\',2) axis off set(gcf,\'Position\',[100 100 360 420]); w1 = min(y); w2 = max(y); %% 绘制坐标轴 xlim = max(abs(x)); ylim = max(abs([w1 w2])); axis(gca,[-xlim xlim -ylim ylim]); xx = get(gca,\'xtick\'); yy = get(gca,\'ytick\'); dx = mean(diff(yy))/5; dy = mean(diff(xx))/5; axis(gca,[-xlim xlim -ylim ylim]); set(gca,\'units\',\'normalized\'); pos1 = get(gca,\'position\'); s1 = [pos1(1) pos1(2)+pos1(4)/2]; s2 = [pos1(1)+pos1(3) pos1(2)+pos1(4)/2]; s3 = [pos1(1)+pos1(3)/2 pos1(2)]; s4 = [pos1(1)+pos1(3)/2 pos1(2)+pos1(4)]; annotation(\'arrow\',[s1(1) s2(1)],[s1(2) s2(2)]) annotation(\'arrow\',[s3(1) s4(1)],[s3(2) s4(2)]) % 显示坐标轴标注 text(max(x)-2,-2,\'x\') % 自己动手调整 text(1,max(y)-2,\'y\') % 自己动手调整 text(-1,-2,\'0\') % 自己动手调整 %% 保存图片 saveas(gcf,\'pic.png\')
