How to Access a Column in a DataFrame (using Pandas) - ActiveState
Introduction to R: Accessing specific elements of a dataframe | learnonline
R Extract Columns from DataFrame - Spark By {Examples}
How to select multiple columns in a pandas dataframe - GeeksforGeeks
iloc() function: Learn to extract rows and columns | Board Infinity
How to Select Columns in R? - Spark By {Examples}
r - Selecting column in dataframe returns NULL - Stack Overflow
5 Ways to Subset a Data Frame in R | R-bloggers
R Data Frame: How to Create, Append, Select & Subset
Pandas Tutorial: DataFrames in Python | DataCamp
The pandas DataFrame: Make Working With Data Delightful – Real Python
9 Data Frames | R Coding Basics
DataFrame Operations in R - GeeksforGeeks
Data wrangling: dataframes, matrices, and lists | Introduction to R - ARCHIVED
dataframe - Data Frame in R - Make operations on columns depending the value of factors in the first columns - Stack Overflow
View data frame in r: use of View() function in R | R-bloggers
How to Access a Column in a DataFrame (using Pandas) - ActiveState
R Data Frame Operations - Adding Observations / Rows And Variable / Column To A Data Frame In R
Data Analysis and Visualisation in R for Ecologists: Manipulating, analyzing and exporting data with tidyverse
R Data Frame Operations - Adding Observations / Rows And Variable / Column To A Data Frame In R
Creating a Data Frame from Vectors in R Programming - GeeksforGeeks
Dealing with Rows and Columns in Pandas DataFrame - GeeksforGeeks
Plotting and data visualization in R | Introduction to R - ARCHIVED
