Plotting many columns from a csv file

问题

Imagine I have a very big csv file with 500 rows and 500 columns. Part of the data shown : a small section of my data

I cannot delete the first couple of rows from my file but I can omit them using "skiprows" while reading the file.

Then I want to plot my data and all methods that I try fail. I actually get a plot if I just use 'plot()" command but what I want is to have the first column as my x data and the rest of 499 columns as my y data. Could you please help me with this?

回答1:

If df is your DataFrame and the first column is named x-data, then you can plot all other columns vs x-data like so:

import matplotlib.pyplot as plt
fig, ax = plt.subplots()
df.iloc[:i+1,:].plot(x='x-data', ax=ax)

来源：https://stackoverflow.com/questions/62036205/plotting-many-columns-from-a-csv-file