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Replace values with other values from another data frame with conditions, the others are unchanged.

Using data.table and dplyr for efficient R Data Frame Matching

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Understanding the 'names' Attribute in NetworkX: Resolving Inconsistencies for Better Graph Management

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R Data Frame Transformation with reshape2 Package

Transforming a Dataset from Rows to Columns in R: A Step-by-Step Guide

Setting Column Values in DataFrames with Non-Integer Indexes: Solutions and Best Practices

Transforming Tree Structures into Wide Tables in R Using the data.tree Package