Python plot heatmap from csv pixel file with panda-CodePudding

I would like to plot a heatmap from a csv file which contains pixels position. This csv file has this shape:

0 0 8.400000e 01
1 0 8.500000e 01
2 0 8.700000e 01
3 0 8.500000e 01
4 0 9.400000e 01
5 0 7.700000e 01
6 0 8.000000e 01
7 0 8.300000e 01
8 0 8.900000e 01
9 0 8.500000e 01
10 0 8.300000e 01

I try to write some lines in Python, but it returns me an error. I guess it is the format of column 3 which contains string. Is there any way to plot this kind of file?

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
import seaborn as sns

path_to_csv= "/run/media/test.txt"
df= pd.read_csv(path_to_csv ,sep='\t')
plt.imshow(df,cmap='hot',interpolation='nearest')

plt.show(df)

I tried also seaborn but with no success. Here the error returned:

TypeError: Image data of dtype object cannot be converted to float

CodePudding user response：

You can set dtype=float as a keyword argument of