您在正确的轨道上,只需要cb.ax.minorticks_on()
。
例如:
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.colors import LogNorm
# fill grid
x = np.linspace(1,10,10)
y = np.linspace(1,10,10)
X, Y = np.meshgrid(x,y)
Z = np.abs(np.cos(X**2 - Y**2) * X**2 * Y)
# plot
f, ax = plt.subplots()
p = plt.pcolormesh(X, Y, Z, norm=LogNorm(), vmin=1e-2, vmax=1e2)
cb = plt.colorbar(p, ax=ax, orientation='horizontal', aspect=10)
cb.ax.minorticks_on()
plt.show()
如果只需要指定的刻度,则仍可以“常规”方式进行设置,但请注意,无论数据范围如何,色条轴坐标系的范围均为0-1。
因此,要设置所需的特定值,我们需要使用norm
图像使用的相同实例来调用标准化刻度位置。
例如:
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.colors import LogNorm
# fill grid
x = np.linspace(1,10,10)
y = np.linspace(1,10,10)
X, Y = np.meshgrid(x,y)
Z = np.abs(np.cos(X**2 - Y**2) * X**2 * Y)
# plot
f, ax = plt.subplots()
p = plt.pcolormesh(X, Y, Z, norm=LogNorm(), vmin=1e-2, vmax=1e2)
cb = plt.colorbar(p, ax=ax, orientation='horizontal', aspect=10)
# We need to nomalize the tick locations so that they're in the range from 0-1...
minorticks = p.norm(np.arange(1, 10, 2))
cb.ax.xaxis.set_ticks(minorticks, minor=True)
plt.show()