Python Histogram ValueError: range parameter must be finite

问题

when plotting Pandas dataframe using a histogram,

sample dataframe data

     distance
0    5.680195
2    0.000000
3    7.974658
4    2.461387
5    9.703089

code I use to plot

import matplotlib.pyplot as plt

plt.hist(df['distance'].values)
plt.show()

I have this error

"ValueError: range parameter must be finite."  

my attempt

df['Round_Distance'] = df['distance'].round(1)

0    5.7
2    0.0
3    8.0
4    2.5
5    9.7

plot again, new error

plt.hist(df['Round_Distance'].values)
plt.show()

ValueError: max must be larger than min in range parameter.

weird thing is, the work around i use is below, i don't have to ROUND

df['distance'].hist(bins=[0,25,50,75,100,125,150,175], color='g')

回答1:

Sounds like you have some NaNs or inf in your actual data. You can select only those values that are finite like this:

import numpy as np

df[np.isfinite(df['distance'])]

So your plot can be obtained like:

plt.hist(df[np.isfinite(df['distance'])].values)

回答2:

Just to add to sacul's answer, you can check if you have NaNs or inf on any of your columns using this:

For NaNs :

df.isnull().sum()

For inf :

df.max()

Hope it helps !

回答3:

NaN cause the issue, i don't need to round it, just drop the NaN, then it works

plt.hist(df['distance'].dropna().values)
plt.show()

来源：https://stackoverflow.com/questions/51642846/python-histogram-valueerror-range-parameter-must-be-finite