The U.S. Weather Service has always phrased rain forecasts as probabilities. I do not want a classification of "it will rain today." There is a slight loss/disutility of carrying an umbrella, and I want to be the one to make the tradeoff. This is coming from personal experience and from multiple contexts, but it seems that many data scientists simply do not understand logistic regression, or binomials and multinomials in general. The problem arises from logistic regression often being taught as a "classification" algorithm in the machine learning world.

If you have ever used Python and scikit-learn to build machine learning (ML) models from large data sets, you may have also wished that you could make these computations go faster. What if I told you that altering a single line of code could accelerate your ML computations? What if I also told you that getting faster results doesn't require specialized hardware? In this article, I will teach you how to train ridge regression models using a version of scikit-learn that is optimized for Intel CPUs, then compare the performance and accuracy of these models trained with the vanilla scikit-learn library. This article continues our series on accelerated ML algorithms.

Deep learning (DL) models are known for tackling the nonlinearities associated with data, which the traditional estimators such as logistic regression couldn't. However, there is still a cloud of doubt with regards to the increased use of computationally intensive DL for simple classification tasks. To find out if DL really outperforms shallow models significantly, the researchers from the University of Pennsylvania experiment with three ML pipelines that involve traditional methods, AutoML and DL in a paper titled, 'Is Deep Learning Necessary For Simple Classification Tasks.' The UPenn researchers stated that a support-vector machine (SVM) model might predict more accurately susceptibility to a certain complex genetic disease than a gradient boosting model trained on the same dataset. Moreover, choosing different hyperparameters within that SVM model can vary performances.

As we discussed previously, Machine Learning refers to algorithms that are used to identify patterns within data. But what exactly do we mean by "patterns", what all can we do with ML, and what is all this jargon about "models" and "training" them. In this article, I'll try to explain all this without getting too technical, and what you, as a business-user, should know about Machine Learning. Supervised Learning implies use-cases where we have a target we're trying to predict given the data. Supervised algorithms enable us to predict the target (for example the estimated credit limit, tractor sales, if the customer will churn, or the mail category) using the input data (customer's credit history, weather and macroeconomic conditions, customer's activity on the platform, mail specifications). There are models both for Regression and Classification problems, i.e. algorithms which can solve these types of problems.

Machine Learning algorithms have always been on the path towards evolution since its inception. Today the domain has come a long way from mathematical modelling to ensemble modelling and more. This evolution has seen more robust and SOTA models which is almost bridging the gap between potentials capabilities of human and AI. Ensemble modelling has given us one of those SOTA model XGBoost. Recently I happened to participate in a Machine Learning Hiring Challenge where the problem statement was a classification problem.

Throughout this article, you will become good at spotting, understanding, and imputing missing data. We demonstrate various imputation techniques on a real-world logistic regression task using Python. Properly handling missing data has an improving effect on inferences and predictions. This is not to be ignored. The first part of this article presents the framework for understanding missing data.

Logistic Regression is one of the supervised Machine Learning algorithms used for classification i.e. to predict discrete valued outcome. It is a statistical approach that is used to predict the outcome of a dependent variable based on observations given in the training set. Logistic Regression is one of the simplest machine learning algorithms and is easy to implement yet provides great training efficiency in some cases. Also due to these reasons, training a model with this algorithm doesn't require high computation power. The predicted parameters (trained weights) give inference about the importance of each feature.

One case study, five models from data preprocessing to implementation with Python, with some examples where no coding is required.

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I recently finished watching this Machine Learning playlist (StatQuest by Josh Starmer) on Youtube and thought of summarizing each concept into a Q/A. As I prepare for more data science interviews, I thought it would be a good exercise to make sure that I am communicating my thoughts clearly and concisely during an interview. Let me know in the comments, if I am not doing a good job in explaining any of the concepts. NOTE: This article is not aimed for teaching a concept to beginners. It assumes that the reader has sufficient background in data science concepts.