Handling Outliers in Python How to detect outliers Histogram Histogram also displays these outliers clearly. Scatter Plot If there are more than one variable and scatter plot is also useful in detecting outliers visually. Handling Outliers If we can’t rectify the outliers, then we may think of some the following methods to handle outliers. Doing …
In this post, let us explore: What is feature selection? Why we need to perform feature selection? Methods What is Feature Selection? Feature selection means selecting and retaining only the most important features in the model. Feature selection is different from feature extraction. In feature selection, we subset the features whereas in feature extraction, we …
Feature Selection: Filter method, Wrapper method and Embedded method Read More »
Principal Component Analysis (PCA) explained with examples In this post, let us understand What is Principal Component Analysis (PCA) When to use it and what are the advantages How to perform PCA in Python with an example What is Principal Component Analysis (PCA)? Principal Component Analysis is an unsupervised data analysis technique. It is …
In this post, let us explore: Random Forest When to use Advantages Disadvantages Hyperparameters Examples Random Forest When to use Random forest can be used for both classification and regression tasks. If the single decision tree is over-fitting the data, then random forest will help in reducing the over-fit and in improving the accuracy. Advantages …
Time Series – Basic concepts Resampling: A) Downsampling In simple terms, it is like aggregating. For example: converting daily data to monthly data, or quarterly data to yearly data etc. In the following example, I have converted daily data to weekly data. B) Upsampling Here we increase the frequency in time series data. It is …
In this post, let us explore: What is the difference between Feature Selection, Feature Extraction, Feature Engineering and Feature Learning Process of Feature Engineering And examples of Feature Engineering Both Feature engineering and feature extraction are similar: both refer to creating new features from the existing features. Feature engineering refers to creating a new feature when we could …
In this post, let us explore: Ensemble Models Bagging Boosting Stacking Ensemble Models/Methods/Learning Ensembling is clubbing predictions from different models to get better performance. How to club different predictions from different models to get a single prediction? There are different ways of doing it. Bagging Boosting Stacking These are the major types of ensembles. To …
Importing data into Python In this post, we will learn: How to import data into python How to import time series data How to handle different time series formats while importing A) Importing Normal Data Suppose you have a data file saved in csv format on your computer. How to import this into Python? I saved …
