Omid - Challenge 151

data-challenges
advanced-exercises
🔰 The results of the simulation in SolidWorks are provided in the Question table, including values of X, Y, and Z .
Published

March 24, 2026

Illustration for Omid - Challenge 151

Challenge Description

🔰 The results of the simulation in SolidWorks are provided in the Question table, including values of X, Y, and Z .

Solutions

library(tidyverse)
library(readxl)

path = "files/CH-151 Solid Worl.xlsx"
input = read_excel(path, range = "B2:F10")
test  = read_excel(path, range = "H2:J11") %>%
  mutate(across(c("y", "z")), round(., 5))

result = input %>%
  as.matrix() %>% 
  t() %>%
  as.numeric() %>%
  keep(!is.na(.)) %>%
  matrix(ncol = 3, byrow = TRUE) %>%
  as.data.frame() %>%
  setNames(c("x", "y", "z")) %>%
  mutate(across(c("y", "z")), round(., 5))

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

  • Logic:

    • Reads the workbook ranges needed for the challenge

    • Builds the intermediate columns that drive the final result

  • Strengths:

    • The R solution stays close to the workbook rule and keeps the transformation compact.

  • Areas for Improvement:

    • The code assumes the sheet structure and source ranges remain stable.

  • Gem:

    • The strongest part of the solution is choosing the right intermediate representation before shaping the final output.
import pandas as pd
import numpy as np

path = "CH-151 Solid Worl.xlsx"

input = pd.read_excel(path, usecols="B:F", skiprows=1, nrows=8).to_numpy().flatten()
test = pd.read_excel(path, usecols="H:J", skiprows=1, nrows=9)

result = [x for x in input if isinstance(x, (int, float)) and not pd.isna(x)]
matrix = np.array(result).reshape(-1, 3)
result_df = pd.DataFrame(matrix, columns=["x", "y", "z"])

print(all(result_df == test)) # True

  • Logic:

    • Reads the workbook ranges needed for the challenge

    • Applies the rule iteratively until the output stabilizes

  • Strengths:

    • The Python version follows the same rule in a direct dataframe-oriented implementation.

  • Areas for Improvement:

    • The code assumes the workbook layout remains stable, so any sheet redesign would require small adjustments.

  • Gem:

    • The implementation stays close to the original workbook rule instead of adding unnecessary abstraction.

Difficulty Level

This task is moderate:

  • The business rule is readable, but the workbook still requires careful implementation to reach the expected layout.