在Python中设置坐标通常有以下几种方法:
1. 使用`coordinate`函数定义坐标:
def coordinate(x, y):
return {
(True, True): 1,
(True, False): 2,
(False, True): 3,
(False, False): 4
}[(x > 0, y > 0)]
if __name__ == "__main__":
x = input("Please insert X: ")
y = input("Please insert Y: ")
print(coordinate(float(x), float(y)))
2. 使用`matplotlib`库设置坐标轴范围:
import matplotlib.pyplot as plt
x = [1, 2, 3, 4, 5]
y = [1, 4, 9, 16, 25]
plt.plot(x, y)
plt.xlim(0, 6)
plt.ylim(0, 30)
plt.show()
3. 控制交互式图像上的坐标点移动:
def change_directions(e):
moves = {
"up": (0, 1),
"down": (0, -1),
"right": (1, 0),
"left": (-1, 0)
}
x, y = (0, 0)
if e:
for v in e:
dx, dy = moves[v]
x += dx
y += dy
print((x, y))
4. 使用`matplotlib`绘制极坐标图:
import matplotlib.pyplot as plt
ax1 = plt.subplot(121, projection="polar")
ax2 = plt.subplot(122)
theta = [i * 0.1 for i in range(10)]
ax1.plot(theta, theta / 6, "--", lw=2)
ax2.plot(theta, theta / 6, "--", lw=2)
plt.show()