y-axis

笛卡儿坐标系 地平坐標系 天頂 For an example of identification of the y-axis with the vertical, and the x-axis with the horizontal, see G.S.Rehill's Interactive Maths

是斜率， b {\displaystyle b\,\!} 是y-截距，即函數的圖形與y-軸（英语：y-axis）相交的y-坐標（英语：y-coordinate）。改變斜率 k {\displaystyle k\,\!} 會使直線更陡峭或平緩。改變y-截距 b {\displaystyle b\,\!} 會將直線向上或下平移。

y-axis 的方向是倒過來的 set(gca,'Fontsize',12) % 改變橫縱軸數值的font sizes xlabel('Time (Sec)','Fontsize',12) % x-axis ylabel('Frequency (Hz)','Fontsize',12) % y-axis

subplot(221) plt.axis('off'); plt.title('Grayscale image of fruits'); plt.imshow(img, cmap='gray', vmin=0, vmax=255) plt.subplot(222) plt.axis('off') plt.title('Horizontal

print(f"Y={y} and the point is on the y-axis.") case Point(x=x, y=0): print(f"X={x} and the point is on the x-axis.") case Point(): print("The point is