Excel BI - Excel Challenge 713

excel-challenges

excel-formulas

🔰 Split the data, stack and multiply the values by 1, 2, 3….for each split.

Published

March 24, 2026

Illustration for Excel BI - Excel Challenge 713

Challenge Description

🔰 Split the data, stack and multiply the values by 1, 2, 3….for each split.

Solutions

library(tidyverse)
library(readxl)

path = "Excel/700-799/713/713 Split and Extract.xlsx"
input = read_excel(path, range = "A2:B6")
test = read_excel(path, range = "D2:E12")

result = input %>%
  mutate(rn = row_number()) %>%
  separate_rows(Data, sep = ", ") %>%
  mutate(Value = Value * row_number(), .by = rn) %>%
  select(-rn)

all.equal(result, test, check.attributes = FALSE)
#> [1] TRUE

Logic: Read the workbook ranges needed for the challenge; Derive the required intermediate columns; Parse the packed text or string structure; Aggregate or rank the data at the required grouping level.
Strengths: The code maps the workbook rule into a compact, reproducible pipeline.
Areas for Improvement: The solution assumes the workbook layout and selected ranges remain stable, so any structural change in the sheet would require small adjustments.
Gem: The elegant part is how little code is needed once the correct intermediate representation is chosen.

import pandas as pd

path = "700-799/713/713 Split and Extract.xlsx"

input = pd.read_excel(path, usecols="A:B", skiprows=1, nrows=4)
test = pd.read_excel(path, usecols="D:E", skiprows=1, nrows=10).rename(columns=lambda x: x.rstrip('.1'))

input = (input.assign(Group=lambda x: x.index + 1, 
                      Data=lambda x: x['Data'].str.split(', '))
             .explode('Data')
             .assign(Position=lambda x: x.groupby('Group').cumcount() + 1,
                     Value=lambda x: x['Position'] * x['Value']))

result = input[['Data', 'Value']].reset_index(drop=True)
print(result.equals(test))

The Python version follows the same grouped logic and keeps the transformation explicit in a dataframe pipeline.

Difficulty Level

Easy / Medium

The business rule is clear, though the workbook still needs a few transformation steps to reach the expected output.