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Armadillo is a powerful and expressive C++ template library for linear algebra and scientific computing. It aims towards a good balance between speed and ease of use, has a syntax deliberately close to Matlab, and is useful for algorithm development... [Read more...]

In this post I’ll walk through an example of how to convert between currencies. A challenge is that the conversion rate is constantly changing. If you have historical data you’ll want the conversion to be based on what the exchange rate was at the t... [Read more...]

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These days web Application Programming Interfaces (APIs) are everywhere (scientific data sources, your system for Customer relationship management, cat facts API…). Do you need to write some R code wrapping a web resource such as an API? Packaging it up might be useful to you or your team for the ... [Read more...]

An updated version of the AsioHeaders package arrived at CRAN yesterday (in one of those pleasant fully-automated uploads and transitions). Asio provides a cross-platform C++ library for network and low-level I/O programming. It is also included in B... [Read more...]

The post What is the best way to filter by row number in R? appeared first on Data Science Tutorials What is the best way to filter by row number in R?, The slice function from the dplyr package can be used to filter a data frame by row number ... [Read more...]

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Introduction League table Team Reviews Cerezo Osaka Shimizu S-Pulse Vissel Kobe Kawasaki Frontale Kashiwa Reysol Kashima Antlers Yokohama F. Marinos Nagoya Grampus Shonan Bellmare FC Tokyo Gamba Osaka Consadole Sapporo Urawa Reds Kyoto Sanga Sagan Tosu Avispa Fukuoka Sanfrecce Hiroshima Jubilo Iwata Data Visualizations Squad Age Profiles Time Interval Scoring ... [Read more...]

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The post How to Filter Rows In R? appeared first on Data Science Tutorials How to Filter Rows In R, it’s common to want to subset a data frame based on particular conditions. Fortunately, using the filter() function from the dplyr package makes this simple. library(dplyr) This tutorial ... [Read more...]

Several of my recent blog posts have been focussed on using {purrr} and {glue} to programatically query a database. [Read more...]

Several of my recent blog posts have been focussed on using {purrr} and {glue} to programatically query a database. This is something I’d been wanting to achieve for some time, but my efforts got put on hold when COVID-19 came along. The ge... [Read more...]

Zhiam Kamvar is Lesson Infrastructure Technology Developer at The Carpentries (Software Carpentry, Data Carpentry & Library Carpentry), an open global community teaching the skills & perspectives to turn data into knowledge.1 Maëlle Salmon is ... [Read more...]

The post What Is the Best Way to Filter by Date in R? appeared first on Data Science Tutorials What Is the Best Way to Filter by Date in R?, Using the dplyr package in R, you can filter a data frame by dates using the following methods. Subsetting with ... [Read more...]

A string is a sequence of characters. For example, "Programming" is a string that includes characters: P, r, o, g, r, a, m, m, i, n, g. In R, we represent strings using quotation marks (double quotes, " " or single quotes, ' '). For example, # string value using single quotes 'Hello' # ... [Read more...]