matplotlib - How to plot multiple graphs with ax.plot_date() in Python -


i trying plot multiple graphs of excel data using plot_date() function. there column in excel file contains dates in "2016-10-05 00:00:00" format. using following code:

import pandas pd df = pd.read_excel('file.xlsx') import matplotlib.pyplot plt fig, axes = plt.subplots(nrows=4, ncols=4, figsize=(12,12)) data_cols = df.columns[8:19] data_col, ax in zip(data_cols, axes.ravel()[:11]):     ax.plot_date(df[data_col], df['date'])

but when use that,

kind of graph occurs.

also, here subset of excel file excel file

obviously not want. how can fix this?


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