Python seaborn 热图 y 轴逆序
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原文地址: http://stackoverflow.com/questions/34232073/
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seaborn heatmap y-axis reverse order
提问by john kals
Have a look at thisheatmap found in the seaborn heatmap documentation.
看看在 seaborn heatmap 文档中找到的这个热图。
Right now the y-axis starts with 9 at the bottom, and ends with 0 on top. Is there a way to turn this around, i.e. start with 0 at bottom and end with 9 at the top?
现在 y 轴从底部的 9 开始，到顶部的 0 结束。有没有办法扭转这种局面，即从底部的 0 开始，顶部的 9 结束？
回答by user3412205
Looks like ax.invert_yaxis()solves it.
好像ax.invert_yaxis()解决了
Following the example from which you got the figure:
按照您从中获得图形的示例：
import numpy as np; np.random.seed(0)
import seaborn as sns; sns.set()
uniform_data = np.random.rand(10, 12)
ax = sns.heatmap(uniform_data)
ax.invert_yaxis()
Gives:
给出：
回答by ryanjdillon
If you are using a 'hex' jointplot()for a heatmap like I was, then you can do this:
如果您jointplot()像我一样使用“十六进制”作为热图，那么您可以这样做：
import matplotlib.pyplot as plt
import numpy
import seaborn
x = numpy.arange(10)
y = x**2
g = seaborn.jointplot(x, y, kind='hex')
g.fig.axes[0].invert_yaxis()
plt.show()
回答by terence hill
I found a simpler method to set the axes order, using the options ylimand xlim. In the following examples I plot H, a 2d matrix (NX x NY), changing the axes order:
我找到了一种更简单的方法来设置轴顺序，使用选项ylim和xlim。在以下示例中，我绘制了 H，一个二维矩阵 (NX x NY)，更改了轴顺序：
import matplotlib.pyplot as plt
import seaborn as sns
NX=10
NY=20
H = np.random.rand(NY, NX)
sns.heatmap(H, xticklabels=True, yticklabels=True, annot = True)
plt.ylim(0,NY)
plt.xlim(0,NX)
plt.show()
NX=10
NY=20
H = np.random.rand(NY, NX)
sns.heatmap(H, xticklabels=True, yticklabels=True, annot = True)
plt.ylim(NY,0)
plt.xlim(NX,0)
plt.show()
