Make a Scatter Plot in matplotlib with dates on x axis and values on y

Question

I am having trouble making a scatter plot that has from a date array and a bunch of PM 2.5 values. My lists would look like the following:

dates = [\'2015-         


        

Answer 1

a pandas dataframe is more common usually. so it's efficient to me:

import pandas as pd
dates = ['2015-12-20','2015-09-12']  
PM_25 = [80, 55]
data = pd.DataFrame({'dates':pd.to_datetime(dates),'PM_25':PM_25})
data.plot(x='dates',y='PM_25',marker='o',linestyle='none')

and you can define more like this:

data.plot(x='dates',y='PM_25',marker='o',linestyle='none',color='red',ms=3)