Blog - Amir Masoud Sefidian, Data Science, Machine Learning, Artificial Intelligence, Deep Learning, Data Analysis

2021-07-24

Python Modules and Packages tutorial

45 mins read Modules If you quit the Python interpreter and enter it again, the definitions you have made (functions and variables) are […]

2021-07-23

Exponential Distribution and its applications

10 mins read We always start with the “why” instead of going straight to the formulas. If you understand the why, it actually […]

2021-07-23

The Poisson Distribution and its applications explained

26 mins read Before setting the parameter λ and plugging it into the formula, let’s pause a second and ask a question. Why […]

2021-07-21

Fourier Transform basics and its applications

18 mins read The frequency domain Sound is a mechanical wave, a vibration in the air or another medium. Musical notes correspond to […]

2021-07-09

Performance evaluation metrics for binary classification with Python code

30 mins read Classification metrics let you assess the performance of machine learning models but there are so many of them, each one has its […]

2021-07-04

Feature Scaling with Scikit-Learn

9 mins read 1 Introduction 2 Loading the libraries 3 Scaling methods 3.1 Standard Scaler 3.2 Min-Max Scaler 3.3 Robust Scaler 3.4 Comparison […]

2021-07-03

Understating and discovering multicollinearity in regression analysis with Python code

9 mins read In this post, I will explain the concept of collinearity and multicollinearity and why it is important to understand them […]

2021-07-02

Measure the correlation between numerical and categorical variables and the correlation between two categorical variables in Python: Chi-Square and ANOVA

27 mins read This scenario can happen when we are doing regression or classification in machine learning. Regression: The target variable is numeric […]

2021-06-27

Understanding Dates, Times, Periods, and Time Zones in Pandas

15 mins read Introduction Time-series data is quite common among many datasets related to fields like finance, geography, earthquakes, healthcare, etc. Properly interpreting […]

2021-06-27

Resampling time series in Pandas: resample and asfreq methods

23 mins read This article is an introductory dive into the technical aspects of resampling methods in pandas. 1. Resampling Resampling is necessary […]

2021-06-26

Time series analysis with Pandas: Power consumption case study

24 mins read Originally developed for financial time series such as daily stock market prices, the robust and flexible data structures in pandas […]

2021-06-26

Labeling financial data for Machine Learning

24 mins read In this article, we’ll be looking at one method for labeling our data and getting it ready for our model. By the […]

2021-06-24

A complete guide on Pandas Hierarchical Indexing (MultiIndex)

31 mins read Pandas is the go-to library when for data analysis when working with tabular datasets. It is the best solution available for […]

2021-06-24

Data selection (indexing and slicing) in Pandas MultiIndex DataFrames

6 mins read A MultiIndex (also known as a hierarchical index) DataFrame allows you to have multiple columns acting as a row identifier and multiple […]

2021-06-18

Positional-only and Keyword-only arguments in Python

4 mins read In this lesson, you’ll learn about how to add positional-only arguments to your functions in Python 3.8. The built-in function float() can be used […]