def create_linegraph(uid, index_type, index_values, fieldid):
    import matplotlib.pyplot as plt

    fig = plt.figure()
    fig.set_size_inches(7.6, 6)
    plt.rcParams.update({"font.size": 16})
    title = "Change in " + index_type + " index with time"
    index_array = []
    day_array = []
    dates_array = []
    xtick_dates = []
    w = 1
    key_num = 0
    for key, val in index_values.items():
        weather_date = key
        dates_array.append(weather_date)
    dates_array.sort()

    for key in dates_array:
        # wes1 = 1#print(index_array[key])
        index_value = float(index_values[key]) / 100
        d_date = str(key)
        y = d_date[0:4]
        m = d_date[4:6]
        d = d_date[6:]
        if int(m) == 1:
            M = "Jan"
        elif int(m) == 2:
            M = "Feb"
        elif int(m) == 3:
            M = "Mar"
        elif int(m) == 4:
            M = "Apr"
        elif int(m) == 5:
            M = "May"
        elif int(m) == 6:
            M = "Jun"
        elif int(m) == 7:
            M = "Jul"
        elif int(m) == 8:
            M = "Aug"
        elif int(m) == 9:
            M = "Sep"
        elif int(m) == 10:
            M = "Oct"
        elif int(m) == 11:
            M = "Nov"
        else:
            M = "Dec"
        n_date = d + "-" + M
        key_num = key_num + 1
        if len(dates_array) - key_num < 7:
            xtick_dates.append(n_date)
            index_array.append(index_value)
            day_array.append(w)
        w = w + 1
    index_array = index_array[::-1]
    day_array = day_array[::-1]
    xtick_dates = xtick_dates[::-1]
    xlab = "Days"
    ylab = "Index Value"
    plt.plot(day_array, index_array)
    plt.xlabel(xlab)
    plt.ylabel(ylab)
    plt.title(title)
    plt.xticks(day_array, xtick_dates)
    plt.grid(True, which="major", color="#666666", linestyle="-")
    # plt.show()
    file_name = uid + "/" + fieldid + "/" + index_type + "_linegraph.png"
    plt.savefig(file_name)
    plt.close()