Getting Row Index Based on Multiple Column Values in Pandas Using np.where with df.index

Why Pandas' MultiIndex Causes Unexpected Behavior When Removing Unused Levels

Indexing Matrices Using Row and Column Indices with DataFrames in R

Understanding Negative Indexes in R: A Deep Dive

Indexing Dates Based on Time Intervals in R Using Loop-Based Approach

Matching Against Only a Subset of Dataframe Elements Using dplyr: Replicating the "Match" Column

Subsetting Data by Conjunction of Two Columns in R Using dplyr

Achieving Parallel Indexing in Pandas Panels for Efficient Data Analysis