獲取matplotlib直方圖函數中的bin的信息

Question

我正在使用matplotlib在python中繪制直方圖：

plt.hist(nparray, bins=10, label='hist')

是否可以打印包含所有箱櫃信息的數據框，例如每個箱櫃中的元素數量？

Answer 1

plt.hist的返回值是：

返回：元組：（n，bins，patches）或（[n0，n1，...]，bin，[patches0，patches1，...]）

所以你需要做的就是適當地捕獲返回值。 例如：

import numpy as np
import matplotlib.pyplot as plt

# generate some uniformly distributed data
x = np.random.rand(1000)

# create the histogram
(n, bins, patches) = plt.hist(x, bins=10, label='hst')

plt.show()

# inspect the counts in each bin
In [4]: print n
[102  87 102  83 106 100 104 110 102 104]

# and we see that the bins are approximately uniformly filled.
# create a second histogram with more bins (but same input data)
(n2, bins2, patches) = plt.hist(x, bins=20, label='hst')

In [34]: print n2
[54 48 39 48 51 51 37 46 49 57 50 50 52 52 59 51 58 44 58 46]

# bins are uniformly filled but obviously with fewer in each bin.

該bins返回其限定用於每個區間的邊緣。