Process Data from Wearable Research Devices Using Two-Regression Algorithms (TwoRegression)
Application of two-regression algorithms for wearable research devices. It provides an easy way for users to read in device data files and apply an appropriate two-regression algorithm. More information is available from Hibbing PR, LaMunion SR, Kaplan AS, & Crouter SE (2017) <doi:10.1249/MSS.0000000000001532>.

Generate ‘BART’ File (genBart)
A set of functions to generate and format results from statistical analyses of a wide range of high throughput experiments that can then be uploaded into the ‘BART’ (Bio-Statistical Analysis Reporting Tool) ‘shiny’ app <https://…/BART>. The app provides users with tools to visualize and efficiently sift through large amounts of data and results.

Delinate Region of Interests (ROI’s) and Extract Time-Series Data from Digital Repeat Photography Images (xROI)
Digital repeat photography and near-surface remote sensing have been used by environmental scientists to study the environmental change for nearly a decade. However, a user-friendly, reliable, and robust platform to extract color-based statistics and time-series from a large stack of images is still lacking. Here, we present an interactive open-source toolkit, called ‘xROI’, that facilitate the process time-series extraction and improve the quality of the final data. ‘xROI’ provides a responsive environment for scientists to interactively a) delineate regions of interest (ROI), b) handle field of view (FOV) shifts, and c) extract and export time series data characterizing image color (i.e. red, green and blue channel digital numbers for the defined ROI). Using ‘xROI’, user can detect FOV shifts without minimal difficulty. The software gives user the opportunity to readjust the mask files or redraw new ones every time an FOV shift occurs. ‘xROI’ helps to significantly improve data accuracy and continuity.

Simple Method for Purging Mediation Effects among Independent Variables (purging)
Simple method of purging independent variables of mediating effects. First, regress the direct variable on the indirect variable. Then, used the stored residuals as the new purged (direct) variable in the updated specification. This purging process allows for use of a new direct variable uncorrelated with the indirect variable. Please cite the method and/or package using Waggoner, Philip D. (2018) <doi:10.1177/1532673X18759644>.

Powell Miscellaneous Functions for Teaching and Learning Statistics (CGPfunctions)
Miscellaneous functions useful for teaching statistics as well as actually practicing the art. They typically are not “new” methods but rather wrappers around either base R or other packages. Currently contains: ‘Plot2WayANOVA’ which as the name implies conducts a 2 way ANOVA and plots the results using ‘ggplot2’. ‘neweta’ which is a helper function that appends the results of a Type II eta squared calculation onto a classic ANOVA table. Mode which finds the modal value in a vector of data. ‘SeeDist’ which wraps around ‘ggplot2’ to provide visualizations of univariate data.

Advertisements