Code Snippets

Code Snippets for Data Engineering, Data Science, Probability, and Machine Learning and More

R Programming

Train Test Split with Base R

Unix

Read file line by line

find and replace with sed

Simple Arithmetic with bc

History with last n commands

Recursive Grep by file type

Pandas

Sorting Dataframe By Value

Sorting Dataframe By Multiple Values

Sorting Dataframe By Row Index

Sorting Dataframe By Column Index

Pandas Apply Row Level

Pandas Apply Using Lambda Expression

Pandas Groupby Text Group Concat

Pandas Groupby Aggregation Multiple Compute Functions

Pandas Groupby with Different Aggregation Functions

Splitting a Column to Multiple Columns

Pandas Series Frequency Value Counts

Filter Dataframe by Column Frequency with value counts

Command Line Tools

find and replace with sed

History with last n commands

Recursive Grep by file type

grep matching

Create multiple subdirectories

Simple Arithmetic with bc

Distance Metrics

Euclidean Distance

Cosine Similarity

Minkowski Distance