Challenge No. 131: Transform the question structure into the result structure.
Solved using:Excel (HSTACK, LET, ROWS), Google Sheets, Power Query (List.Skip, List.Split, List.Transform), Python, Python in Excel, and R.
Data Cleaning
The process of cleaning data
Table Transformation! Part 11
Challenge No. 122: Transform the question table into the reult table format.
Solved using:Excel (DROP, FILTER, HSTACK), Google Sheets, Power Query (List.Transform, Text.Contains, Table.AddColumn), Python, Python in Excel, and R.
Missing Values! Part 3
Challenge No. 92: In the question table, some cells (highlighted) are missing, but a character determines how to fill them based on the following rule:
R = right cell
L = left cell
U = upper cell
D = down cell.
Solved using:Excel (IF, IFS, INDEX), Power Query (List.PositionOf, List.Transform), Python, Python in Excel, and R.
Table Transformation! Part 9
Challenge No. 89: Product sales information is provided in the question table.
Solved using:Excel (COUNTA, FILTER, HSTACK), Power Query (List.Transform, Table.SelectRows, Table.Skip), Python, Python in Excel, and R.
Knn Missing Value!
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.
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.
Table Transformation! Part 8
Challenge No. 65: In the question table, the total costs for different date ranges are provided.
Solved using:Excel (HSTACK, LAMBDA, LET), Power Query (List.Dates, List.Transform, Table.AddColumn), 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.
Missing Values! Part 1
Challenge No. 54: The table presents the actual progress of three projects at the end of each month, but some values are missing.
Solved using:Excel (DATE, DROP, EOMONTH), Power Query (List.Transform, Table.Group, Table.TransformColumnTypes), 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.