Introduction Having figured out how to perform walk-forward analysis in Python with backtrader, I want to have a look at evaluating a strategy’s performance. So far, I have cared about only one metric: the final value of the account at the end of a backtest relative. This should not ...

Proposed solution to Euler Problem 28 in the R language for statistical computing. What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral? Continue reading → The post The Ulam Spiral (Euler Problem 28) appeared first on The Devil is in the Data.

By Gabriel Vasconcelos Motivation In a late post I talked about inference after model selection showing that a simple double selection procedure is enough to solve the problem. In this post I’m going to talk about a generalization of the … Continue reading →

In advance of the recent UK general election, ODI Leeds published an interactive hexmap of constituencies to provide a navigation surface over various datasets relating to Westminster constituencies: As well as the interactive front end, ODI Leeds published a simple JSON format for sharing the hex data – hexjson that allows ...

Mango Solutions are excited to announce that the venue and dates have now been confirmed for the third EARL Boston Conference. Delegates will enjoy a new vibe this year,...

Bagging is a powerful method to improve the performance of simple models and reduce overfitting of more complex models. The principle is very easy to understand, instead of fitting the model on one sample of the population, several models are fitted on different samples (with replacement) of the population. Then, ...

As part of my new role as Lecturer in Agri-data analysis at Harper Adams University, I found myself applying a lot of techniques based on linear modelling. Another thing I noticed is that there is a lot of confusion among researchers in regards to what technique should be used in ...

Setup This project details our analysis of the movie dataset that contains information from Rotten Tomatos and IMDB for a random sample of movies. The purpose of this project is to develop a multiple linear regression model to understand what att...

Lately, I have been more and more taken with tidy principles of data analysis. They are elegant and make analyses clearer and easier to comprehend. Following the tidyverse and ggraph, I have been quite intrigued by applying tidy principles to text anal...

Shiny applications of all stripes (including flexdashboard with runtime Shiny) are revolutionary in that they put the power of R directly in the end user’s hands without needing to interact directly with the language. A common way end-users wish to interact with their data is via a dashboard that ...

The Mandelbrot set is iconic and countless beautiful visualisations have been born from its deceptively simple recursive equation. R’s plotting ecosystem should be the perfect setting for generating these eye-catching visualisations, but to date the package support has been lacking. … Continue reading →

Update 29/06/2017: The approach outlined in this blogpost was taken under the assumption that gender is binary but that is incorrect. Do read on as it might inspire you to do better and if you do wish to contribute to the topic check out Forwards. The representation of women in technology ...

Written by Chen Trilnik and Jack Yip. To view the original source code, visit our Github repo here.   I. Introduction Business Objective In the last decade, […] The post Forecasting Economic Risk in the EU into 2020 appeared first on NYC Data Science Academy Blog.