Plotting and smoothing

plot-and-smooth.py

import csv
from datetime import datetime
import matplotlib.pyplot as plt
from scipy.signal import savgol_filter

# Input is a csv file in the following form
# the value to be plotted, date (timestamp), .... whatever


def plot_times(infile):
    times = []
    dates = []
    reader = csv.reader(infile, delimiter=',', quotechar='|')
    for r in reader:
        times.append((int(r[0]) / 1000) / 60)
        ustamps.append(int(r[1]))
        dates.append(datetime.fromtimestamp(
            int(r[1])).date())

    times_smooth = savgol_filter(times, 99, 1)

    plt.plot(dates, times)
    plt.plot(dates, times_smooth, color='red')
    plt.show()

xxx-input.csv