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data-analysis

Analyzing data with Excel tools and filters

SoftwareExcel Pivot Table: Elapsed Days from Bill_Date & Overdue Filter

Learn to create a pivot table in Excel calculating elapsed days (TODAY() - Bill_Date), filtering overdue bills >10 days with Bal_Amt >0, grouped by Party_Name. Beginner guide with helper columns, Excel Tables, and dynamic summaries for outstanding balances.

3 answers• 1 view
ProgrammingPandas Pivot Table: Long to Wide DataFrame Guide

Learn pandas pivot and pivot_table to reshape DataFrames from long to wide format. Handle duplicates with aggfunc (mean, sum), fill NaNs, multi-indexes, crosstab counts, and melt reverse. Code examples for real scenarios.

6 answers• 2 views
ProgrammingZ-Score Deviation in Small Samples: Is -0.07 Significant?

Learn to calculate z-score for measuring a number's deviation from a small set like [27,43,17,5] with x=22. Is -0.07 significant or negligible? JS code review, interpretation thresholds, small sample challenges, and z vs t-test.

1 answer• 1 view
ProgrammingKernel ICA in R: Implementation Guide

Learn how to implement kernel independent component analysis in R using the KernelICA package. Step-by-step guide with code examples.

1 answer• 1 view
ProgrammingHow to Check if a Column Exists in Pandas DataFrame

Learn multiple methods to check if a column exists in Pandas DataFrame and conditionally add columns based on column verification.

1 answer• 2 views