#8 update grouped bar example

sphinx/source/examples/grouped_bar/README.txt

@@ -6,4 +6,5 @@ Below is a gallery of grouped bar charts.
 
 - RICK Vertical Grouped Bar Chart: derives from the RICK package with source code in `rick.py`.
 - RICK Horizontal Grouped Bar Chart: derives from the RICK package with source code in `rick.py`.
+- RICK Multi Stacked Bar Chart: derives from the RICK package with source code in `rick.py`.
 

sphinx/source/examples/grouped_bar/plot_multi_stacked_bar.py

@@ -0,0 +1,52 @@
+"""
+RICK Multi Stacked Bar Chart
+=======================
+
+Example of a horizontal grouped bar chart.
+"""
+import os
+import os.path as osp
+import sys
+sys.path.append(osp.dirname(osp.dirname(osp.dirname(osp.dirname(osp.dirname(osp.abspath(__file__)))))))
+
+from sqlalchemy import create_engine
+import matplotlib.pyplot as plt
+import matplotlib as mpl
+import pandas as pd 
+import configparser
+from psycopg2 import connect
+import psycopg2.sql as pg
+import pandas.io.sql as pandasql
+import numpy as np 
+import datetime
+import math
+import rick
+import geopandas as gpd
+import os
+import shapely
+from shapely.geometry import Point
+####os.environ["PROJ_LIB"]=r"C:\Users\rliu4\AppData\Local\Continuum\anaconda3\Library\share"
+import importlib
+import matplotlib.ticker as ticker
+import matplotlib.font_manager as font_manager
+
+
+################################
+#multi_stacked_bar_chart
+#--------------------------
+#
+#This Section uses the revised multi_stacked_bar_chart function with a customized dataframe.
+
+np.random.seed(42)
+data1 = {
+    'Location': ['Scarborough', 'Etobicoke York', 'North York', 'East York'],
+    '2016': [58640, 57210, 59490, 63090],
+    '2018': [93810, 90690, 84720, 93550],
+    '2020': [81538, 77456, 80235, 73692]
+}
+
+df = pd.DataFrame(data1)
+##df = df.set_index('Category')
+
+fig, ax = rick.charts.multi_stacked_bar_chart(df, xlab = 'Trips', lab1 = '2016', lab2 = '2018', lab3 = '2020', xmax= 250000)
+fig.tight_layout()