MATCHACURVE
for R

An
Integrated Forest Management Lab Collective Project

Introduction

Chester Jensen, a USFS Research Scientist at the
Intermountain Forest and Range Experiment Station put together a series of
papers called “Matchacurve” that showed how different
equations and their associated parameters influenced the shape and range of
curves. They provided a series of hard copy graphs that could be used to aid
researchers match curve forms with their data. We update this work here,
providing an R-shiny web interface to allow modern-day research an interactive
tool to examine equation forms and data, a skill that we think has been largely
lost due to smoothing algorithms, spreadsheets, and imputation.

Chester’s original papers were:

Jensen
and Homeyer 1970 Sigmoid and Bell-Shaped Curves

Jensen
and Homeyer 1971 Curves of class X^N

Jensen
1973 Multidimensional Mathematical Models