• R from afar

    MailR SMTP Setup (Gmail, Outlook, Yahoo) | STARTTLS

    The mailR package allows you to easily send e-mails with R, but you need the right mailR SMTP settings. Getting the SMTP settings just right to establish a connection to e-mail hosts like Gmail, Outlook, or Yahoo can be challenging. This is especially true when there are some settings you need to change on the host side to make everything work. In this post, I'll show you how to connect to the major e-mail providers such as Gmail, Outlook, Yahoo, Hotmail, and AOL. For each host, you'll get the SMTP host name, ports and login requirements. In addition, I'll show you how to deal with STARTTLS, the default secure communications…

  • teaching

    Learning and Teaching R | Get to the Plot

    As an experienced R user, I have seen numerous social media posts and perhaps even a few stackexchange requests over the years asking the question, “how do I learn R?”. This is a great question. A related one is, “how do I teach or coach R?” To the would-be student, I ask, “What attracted you to R in the first place?” I suspect it wasn't that it was free, though this is a reasonable motivation considering the cost of comparable commercial software. To the newcomer, were you attracted to R because of a graph you saw on the web, in a lecture, presentation or article? Teachers, what drew you to…

  • Ergonomics

    Super Dark IDE Theme, R-Studio, Inverted Color

    A dark IDE theme may increase visual comfort and productivity for those spending extended amounts of time coding, writing, and reading at a computer terminal. Why? If your 9 to 5 has you chained to a computer, you’ve likely experienced eye strain. Typical symptoms include soreness, irritation, and difficulty focusing your vision. All of which will slow your productivity. In this post, we’ll make work environments like R-studio even easier on the eyes, by making it truly “dark”, including your plot area, window frames, etc. The nice part about the solution I’ll be sharing with you is it even works for word processor and spreadsheet software, which have always been…

  • rlang

    Run Remote R Scripts with Mobile Device using E-mail Triggers

    Have you ever been on the road and wished you could run an R script from your mobile device and see the results? Maybe you’re a business person who needs a quick update on a project or production schedule. Or, possibly you need an up-to-the-minute report out for a meeting, and you don’t have a “cloud based solution to get you the important data. In short, there is data you want and can’t get because you’re not onsite to run an R script. In this post, I’ll show you how to resolve this issue using headless R and E-mail triggers. Objectives: Run an R script from a mobile device Review…

  • WooCommerce

    WooCommerce Image Gallery | Step by Step, Automate with R

    Setting up a WooCommerce image gallery for your shop is a grueling process if you use the online forms. Thankfully, you can import goods and setup an image gallery using a simple CSV file. Now, if you have a few products and a few images for each product, preparing the CSV for bulk import using your favorite spreadsheet program is trivial. But, if you have lots of products and lots of images per product, manually creating the CSV via spreadsheet becomes a considerable task. However, if we know the CSV structure, we leverage R to help us automate this task in a more scaleable way. Objectives: Understand what’s in a…

  • control charts

    XmR Chart | Step-by-Step Guide by Hand and with R

    Is your process in control? The XmR chart is a great statistical process control (SPC) tool that can help you answer this question, reduce waste, and increase productivity. We'll cover the concepts behind XmR charting and explain the XmR control constant with some super simple R code. Lastly, we'll cover how to make the XmR plot by hand, with base R code, and the ggQC package. Objectives: When you’re done with this post, you should: Grasp the XmR chart concept and utility Understand the math necessary to create the XmR chart by hand, and why moving range should be used instead of standard deviation to determine control limits. XmR Chart…

  • control charts

    XmR Control Limits | Why Moving Range, not Standard Deviation

    So, you want to know why we use mean moving range, mean(mR), and not standard deviation to determine XmR control limits. Before answering, let's do a quick review to make sure we are starting on the same page. The mean(mR) is determined by first finding the absolute difference between sequential pairwise measurements. This gives you a series of moving ranges – mR. Next, you calculate the mean of those ranges to give you mean(mR). Below are some sample calculations. Once you've determined the mean(mR), you are in a position to calculate the sequential deviation: mean(mR) / 1.128. By multiplying the sequential deviation by ± 3, we can establish the XmR…

  • control charts

    Control Chart Constants | Tables and Brief Explanation

    Jump to Control Chart Constants: Bias Correction Constants: d2, c4, d3, d4 XmR Constants (n=2): d2, A2, D3, D4 XbarR Constants: d2, d3, A2, D3, D4 XbarS Constants: c4, A3, B3, B4 Control chart constants are the engine behind charts such as XmR, XbarR, and XbarS. And, if you've made a control chart by hand or sat in a class, you'll likely have memories of bizarre constants like d2, A2, etc. To me, control chart constants are a necessary evil. Why? Because, it's a nuisance to look up a constant to make a chart, and I suspect that has likely frightened away many would be users over the years. These…

  • control charts,  ggQC

    ggQC | ggplot Quality Control Charts – New Release

    The ggQC package is a quality control extension for ggplot. Use it to create XmR, XbarR, C and many other highly customizable Control Charts. Additional statistical process control functions include Shewart violation checks as well as capability analysis. If your process is running smoothly, visualize the potential impacted of your next process improvement with a Pareto chart. To learn more, read on! To get started with ggQC, install it from CRAN by running the following code: 1 install.packages("ggQC")install.packages("ggQC") ggQC Control Charts Control charts are a great way to monitor process outputs, drive improvement, and evaluate measurement systems. The types of control chart types supported by ggQC include: Individuals Charts :…