Category: R

Feed: R-bloggers. Author: R Views. In previous posts, we covered how to run a Monte Carlo simulation and how to visualize the results. Today, we will wrap that work into a Shiny app wherein a user can build a custom portfolio, and then choose a number of simulations to run and a number of months to simulate into the future. A link to that final Shiny app is here and here is a snapshot: We will use RMarkdown to build our Shiny application by inserting runtime: shiny into the yaml header. This will alert the server (or our laptop) that ... Read More

Feed: R-bloggers. Author: Peter Prevos. We all hate the experience of calling a service provider and being placed on hold for a very long time. Organisations that take their level of service seriously plan their call centres so that the waiting times for customers is within acceptable limits. Having said this, making people wait for something can in some instances increase the level of perceived value. Call centre performance can be expressed by the Grade of Service, which is the percentage of calls that are answered within a specific time, for example, 90% of calls are answered within 30 seconds ... Read More

Feed: R-bloggers. Author: rOpenSci - open tools for open science. R packages are widely used in science, yet the code behind them often does not come under scrutiny. To address this lack, rOpenSci has been a pioneer in developing a peer review process for R packages. The goal of pkginspector is to help that process by providing a means to better understand the internal structure of R packages. It offers tools to analyze and visualize the relationship among functions within a package, and to report whether or not functions’ interfaces are consistent. If you are reviewing an R package (maybe ... Read More

Feed: R-bloggers. Author: Bernardo Lares. To automate the process of modeling selection and evaluate the results with visualization, I have created some functions into my personal library and today I’m sharing the codes with you. I run them to evaluate and compare Machine Learning models as fast and easily as possible. Currently, they are designed to evaluate binary classification models results. Before we start, let me show you the final outcome so you know what we are trying to achieve here with just a simple R function: So, let’s start! The results object First of all, we need to have ... Read More

Feed: R-bloggers. Author: nsaunders. Dual-axes at tipping-point Sydney’s congestion at ‘tipping point’ blares the headline and to illustrate, an interactive chart with bars for city population densities, points for commute times and of course, dual-axes. Yuck. OK, I guess it does show that Sydney is one of three cities that are low density, but have comparable average commute times to higher-density cities. But if you’re plotting commute time versus population density…doesn’t a different kind of chart come to mind first? y versus x. C’mon. Let’s explore. First: do we even believe the numbers? Comments on the article point out that ... Read More

Feed: R-bloggers. Author: business-science.io - Articles. The goal is simple: to educate and empower future data scientists so they can help organizations gain data-driven results. This is why it was a no-brainer when the opportunity came up for Business Science to partner with Method Data Science, the go-to data science accelerator for aspiring data scientists. Now Method Data Scientists will get exclusive lectures from Business Science Instructors and have discounted access to Business Science University, the revolutionary online education platform for learning data science for business, along with instructor trainings as part of the Method Data Science accelerator program. This ... Read More

Feed: R-bloggers. Author: nsaunders. I love it when researchers take the time to share their knowledge of the computational tools that they use. So first, let me point you at Environmental Computing, a site run by environmental scientists at the University of New South Wales, which has a good selection of R programming tutorials. One of these is Making maps of your study sites. It was written with the specific purpose of generating simple, clean figures for publications and presentations, which it achieves very nicely. I’ll be honest: the sole motivator for this post is that I thought it would ... Read More

Feed: R-bloggers. Author: Lorenz Walthert. I am currently experiencing problems with getting my posts in full length onr-bloggers. You can continue here withreading in case only the first paragraph is rendered. One cool thing that happens if you work resonates in the community is that yousee other people using it. In this blog post I am going to address a typicalquestion people have when they want to use a source code formatter – inparticular styler: I don’t like rule xyz of the tidyverse style guide, which is the defaultstyle guide implemented in styler. How can I tell styler not to ... Read More

Feed: R-bloggers. Author: R on Gianluca Baio. I was trying to find an apt image to accompany this post, but googling “sleek and shiny” mostly brought up images of women with ridiculously, well, sleek and shiny hair (and magical products to achieve just that), which has nothing to do with what I want to talk about here (not that this has ever stopped me including pics that have nothing to do with the actual post, of course…). Anyway, Andrea has been doing lots of work and has suggested an upgrade to the BCEAweb webapp, mainly involving a move towards Shiny ... Read More

Feed: R-bloggers. Author: Carmen Chan. In Displayr, Visualizations of chart type Column, Bar, Area, Line and Scatter all support trend lines.  Trend lines can be  linear or non-parametric (cubic spline, Friedman’s super-smoother or LOESS). Adding a linear trend line Linear trend lines can be added to a chart by fitting a regression to each series in the data source. In the chart below, the linear trends are shown as dotted lines in the color corresponding to the data series. We see there is considerable fluctuation in the frequency of each search term. But the trend lines clarify that the overall ... Read More