Challenge No. 84: Normal distribution was a kind of nightmare in university for me, but now let’s solve it using Excel.
Solved using:Excel (HSTACK, IF, INDEX), Power Query (Table.AddColumn), Python, Python in Excel, R, and VBA.
TAKE
Returns a specified number of rows or columns from an array in Excel.
Convex Hulls (Gift Wrapping Algorithm)!
Challenge No. 80: The Convex Hull Algorithm leads to the smallest convex area (Polygon) that includes all the points in the dataset.
Solved using:Excel, Python, and R.
Determining Missing Fields
Challenge No. 74: Customer information including Name, Family, Phone, and Website is provided in the question table.
Solved using:Excel (ARRAYTOTEXT, FILTER, HSTACK), Power Query (List.Difference, List.Distinct, Text.Combine), Python, and R.
Custom Splitter (Part 2)!
Challenge No. 73: In the Question table, sales information including Date, Product Names, and quantity are provided without any separators like CH 63 with the difference that on each date, more than one transaction might provided.
Solved using:Excel (CHAR, DROP, HSTACK), Power Query (List.Skip, List.Transform, Table.AddColumn), Python, and R.
Fibonacci Sequence!
Challenge No. 72: Generate the first 18 terms of Fibonacci sequence as result table.
Solved using:Excel, Power Query, Python, R, and VBA.
Sales By States!
Challenge No. 69: In Table 1, sales transactions are provided, and the state of each customer is presented in Table 2.
Solved using:Excel (FILTER, HSTACK, LAMBDA), Power Query (Table.AddColumn, Table.Group), Python, R, and SQL.
Custom Splitter!
Challenge No. 63: In the Question table, sales information including Date, Product Name, and Quantity is provided without any separators.
Solved using:Excel (CHAR, HSTACK, LAMBDA), Power Query (List.Contains, Table.Combine, Table.FromRows), Python, R, and VBA.
Missing Values! Part 2
Challenge No. 62: The question table presents the actual progress of 3 projects at the end of each month, but some values are missing.
Solved using:Excel (DATE, DROP, IF), Power Query (Date.Month), Python, and R.
Sales Per Customer
Challenge No. 61: In Question Table 1, sales transactions are provided.
Solved using:Excel (FILTER, HSTACK, IF), Power Query (Table.Group, Table.Sort), Python, R, and VBA.
Match Payments!
Challenge No. 60: The customer receipt costs and their payments are provided in Question Tables 1 and 2.
Solved using:Excel, Power Query, and R.