add Pandas pivot()

Author: BindiChen

README.md

@@ -63,7 +63,7 @@ Practical Machine Learning topics for articles in my [Medium blog](https://bindi
     * [Accessing data in a MultiIndex DataFrame](https://bindichen.medium.com/accessing-data-in-a-multiindex-dataframe-in-pandas-569e8767201d) | [![View on Github](https://img.shields.io/badge/Github-Notebook-orange?logo=Github)](data-analysis/031-pandas-multiIndex/multiindex-selection.ipynb)
 * Reshaping
     * [Reshaping a DataFrame from wide to long format using `melt()`](https://bindichen.medium.com/reshaping-a-dataframe-using-pandas-melt-83a151ce1907) | [![View on Github](https://img.shields.io/badge/Github-Notebook-orange?logo=Github)](data-analysis/048-pandas-melt/pandas-melt.ipynb)
-    * `pivot()` long to wide (work in progress)
+    * [Reshaping a DataFrame from long to wide format using `pivot()`](https://bindichen.medium.com/reshaping-a-dataframe-from-long-to-wide-format-using-pivot-b099930b30ae) | [![View on Github](https://img.shields.io/badge/Github-Notebook-orange?logo=Github)](data-analysis/049-pandas-pivot/pivot.ipynb)
     * [Reshaping a DataFrame/Series with `stack()` and `unstack()`](https://bindichen.medium.com/reshaping-a-dataframe-with-pandas-stack-and-unstack-925dc9ce1289) | [![View on Github](https://img.shields.io/badge/Github-Notebook-orange?logo=Github)](data-analysis/067-pandas-stack/pandas-stack-unstack.ipynb)
 * Grouping and Summarizing
     * [Pandas `groupby()` for grouping data and performing operations](https://bindichen.medium.com/all-pandas-groupby-you-should-know-for-grouping-data-and-performing-operations-2a8ec1327b5) | [![View on Github](https://img.shields.io/badge/Github-Notebook-orange?logo=Github)](data-analysis/032-pandas-groupby/pandas-groupby.ipynb)

data-analysis/049-pandas-pivot/data-2.csv

@@ -0,0 +1,16 @@
+Country,Lat,Long,Date,Cases,Recovered
+France,31.8257,117.2264,22/01/2020,10,1
+US,40.0,-100.0,22/01/2020,20,2
+UK,55.3781,-3.436,22/01/2020,30,3
+France,31.8257,117.2264,23/01/2020,40,4
+US,40.0,-100.0,23/01/2020,50,5
+UK,55.3781,-3.436,23/01/2020,60,6
+France,31.8257,117.2264,24/01/2020,70,7
+US,40.0,-100.0,24/01/2020,80,8
+UK,55.3781,-3.436,24/01/2020,90,9
+France,31.8257,117.2264,25/01/2020,100,10
+US,40.0,-100.0,25/01/2020,110,11
+UK,55.3781,-3.436,25/01/2020,120,12
+France,31.8257,117.2264,26/01/2020,130,13
+US,40.0,-100.0,26/01/2020,140,14
+UK,55.3781,-3.436,26/01/2020,150,15

data-analysis/049-pandas-pivot/data.csv

@@ -0,0 +1,16 @@
+Country,Lat,Long,Date,Cases
+France,31.8257,117.2264,22/01/2020,1
+US,40.0,-100.0,22/01/2020,2
+UK,55.3781,-3.436,22/01/2020,3
+France,31.8257,117.2264,23/01/2020,4
+US,40.0,-100.0,23/01/2020,5
+UK,55.3781,-3.436,23/01/2020,6
+France,31.8257,117.2264,24/01/2020,7
+US,40.0,-100.0,24/01/2020,8
+UK,55.3781,-3.436,24/01/2020,9
+France,31.8257,117.2264,25/01/2020,10
+US,40.0,-100.0,25/01/2020,11
+UK,55.3781,-3.436,25/01/2020,12
+France,31.8257,117.2264,26/01/2020,13
+US,40.0,-100.0,26/01/2020,14
+UK,55.3781,-3.436,26/01/2020,15