In the Fall 2023 semester, we are meeting on Thursdays at 3:05 pm (Central): at ISU, we meet in 2113 Snedecor (the big conference room), at UNL, we will also meet via Zoom. Please join us for presentations on statistical graphics and computational tools.
Contact Heike Hofmann, hofmann at iastate.edu, for access to the Zoom link.
Algorithmic assessment of striation similarity between wire cuts
The comparative evaluation of aluminum wire cuts holds considerable significance within the field of forensic science. Nonetheless, there exists an absence of a systematic algorithmic framework for assessing their degree of similarity. In our recently introduced algorithm, we address this void by undertaking an examination of surface cuts presented in the x3p format.
The youdrawitR package - a GSOC experience
You Draw It’ is a feature that allows users to interact with a chart directly by drawing a line on their computer screen with a mouse. Originally introduced by the New York Times in 2015 for the purpose of interactive reading, we aimed to adapt and demonstrate the use of the ‘You Draw It’ method as a tool for interactive testing of graphics.
A shiny Model Buildr for Psychophysics Data
User experiments are essential for informing researchers what an audience sees in a chart. User experiments are generally quite expensive in monetary value and in the time spent getting data. We must make the most out of the data we get from participants. Statistically, the best practice for data with repeated measurements is using (Generalized) Linear Mixed Effects Models (GLME).
Jury Perception of Bullet Matching Algorithms and Demonstrative Evidence
Subjective pattern comparison has been subject to increased scrutiny by the courts and by the general public, resulting in an increased interest in pattern comparison algorithms that provide quantitative assessments of similarity for use by forensic scientists. While these algorithms would mark an improvement over current subjective comparison methods, individuals without a statistical background may struggle with the statistical concepts and language necessary for describing algorithmic methods.
Quantifying Writer Variance Through Rainbow Triangle Graph Decomposition of the Common Word ‘the’
Handwriting comparative analysis has recently been criticized based off the subjective nature of traditional examinations. To support traditional examination with objective measures, this project provides results from a study where features of handwriting are examined through point decomposition and rainbow triangulation. …
Using Python in R through the Reticulate Package and its Integration with R Shiny
Reticulate
Package in R creates a R interface to Python, allowing for R and Python to be used smoothly with each other.…