Publications by R on Thomas Roh
leaflegend Recipes
Color Scales Create Legend for a Continuous Scale Create Legend for Quantiles Create Legend for Bins and Change Legend Symbol Create Legend for Factors and Re-order Symbols and Size Scales Legend and Points with Size Encoding Legend and Points with Double Encoding Legend and Points with Size and Color Encoding Legend and Points with Symbol Enc...
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MMC Queues
Introduction Queueing Theory is the quantitative study of operational characteristics of a system of workflows for a service/process given a processing time, an arrival pattern, and a limitation of resources. It can answer questions such as: How long would a customer/part/etc. (entities) wait to be processed? What is the probability of x or more...
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fitur 0.5.20 Release
DESCRIPTION summary has been updated Examples have been updated for fit_univariate, fit_empirical fit_empirical_discrete and fit_empirical_continuous are no longer exported added plot_qq and plot_pp functions for diagnostic plotting of fits Added a vignette Diagnostic Plots for Fitting Distributions Introduction vignette has updated examples fit...
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Queueing Notation
Queueing theory has some commonly accepted shorthand to describe characteristics of queuing models. Although across books and peer reviewed articles you will see slight variations, this post outlines commonly accepted terms for reference. Kendall’s Notation Kendall’s notation was proposed as a standard for describing queueing models. You may...
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Statistical Distribution Tables
\(\text{Normal Distribution}\) Table 2: Cumulative Probabilities of the Standard Normal Distribution, \(X \sim N(0,1)\) z 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.0 0.5000 0.5040 0.5080 0.5120 0.5160 0.5199 0.5239 0.5279 0.5319 0.5359 0.1 0.5398 0.5438 0.5478 0.5517 0.5557 0.5596 0.5636 0.5675 0.5714 0.57...
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Building Distribution Reference Tables in R
I’ve recently been studing for a professional exam that does not allow computers or advanced calculators. Some of the subject matter will require use of a few statistical distributions which can be very time-consuming to calculate manually. In lieu of access to statistical functions, you are allowed to bring books and some reference sheets. I w...
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fitur 0.5.25 Release
Fixed appearance of plots Added plot_density function for comparison pdfs of fitted functions Updated argument naming conventions fitur on CRAN Density Diagnostic Plot library(fitur) library(ggplot2) library(trstyles) set.seed(37) x <- rgamma(10000, 5) dists <- c('gamma', 'lnorm', 'weibull') fits <- lapply(dists, fit_univariate, x = x) theme_se...
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PE Industrial Engineer Reference Sheet
You contribute to the reference sheet here: https://github.com/tomroh/pe_ise_prep. Systems Definition, Analysis, and Design System Analysis and Design Tools Cause-Effect Diagram (Fishbone) Pareto Analysis 80% of the items represent 20% of the sales or 20% of the items represent 80% of the cost. This law is a rule of thumb. Operation Process ...
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Animating a Monte Carlo Simulation
Introduction Oftentimes, I run into difficulty trying to explain some of the concepts of statistical sampling with audiences that either have very limited or no understanding of statistics. Given that the majority of communication of analysis has to be digested in a 1-2 hour meeting, data visualization typically is the best route for communicatin...
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Speed Up Shiny Coding with Data
Introduction In this excercise, I’m going to show how to automate some aspects of coding in shiny to speed up development. Traditionally, in user interface development, one has to explicitly type out each individual input argument. For small applications, this is justified and probably isn’t worth the time to automate the task. The first part...
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