Challenge No. 86: K-nearest neighbors (KNN) is a simple technique for replacing missing values with the average of the nearest values.
Solved using:Excel, Power Query, and VBA.
MATCH
Returns the relative position of a value in an array in Excel.
Text After Last Number
Challenge No. 15: Find the text of string following the last numeric digit in a string.
Solved using: Python in Excel.
Total Distance!
Challenge No. 81: The distance between cities and staff travels are provided in the question distance and travel tables.
Solved using:Excel (DROP, IFNA, INDEX), Power Query (Table.AddColumn), Python, and R.
Case-Sensitive Revenue Lookup
Challenge No. 9: Provide the Excel formula to get Revenue in cell E3 for a company given in cell E2.
Solved using: Python in Excel.
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.
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.
Find Missing Numbers!
Challenge No. 52: In the Question Table, numbers ranging from 1001 to 1018 are listed.
Solved using:DAX, Excel (COUNTIF, FILTER, IF), Power Query (List.Difference), Python, Python in Excel, R, SQL, and VBA.
Assignment Problem (Part 2)!
Challenge No. 50: In the continuation of the previous challenge, we reach the question table as the normalized table, in the rest of the algorithm the below step should be done.
Solved using:Excel (AND, BYCOL, BYROW), Power Query (List.Transform, Table.Column), Python, and R.
Sudoku In Excel
Challenge No. 19: Solve the left side Sudoku table and replace X by a number based on the below rule:
Use the numbers 1 through 6 instead of X.
Solved using:Excel, Power Query, and VBA.
Analyze Customer Purchasing Patterns!
Challenge No. 5: Determine how frequently products are bought together (same invoice number).
Solved using:Excel, and Power Query.