Recent & Upcoming Talks

Applications of R Shiny to Explore, Evaluate and Improve Total Survey Quality
Tue, Jun 11, 2019 4:30 PM
Progress Report: Visualization of Sheet and Rill Erosion on US Cropland
Wed, Feb 13, 2019 12:10 PM
Overlay Spatial Objects in R
Thu, Oct 26, 2017 4:10 PM
Shiny Application to Iowa DNR MSIM-SGCN Modeling
Fri, Sep 23, 2016 2:10 PM

Shiny Apps

ISA On-Farm Trial Summarization Tool

Designed to provide individual and across field summaries of on-farm trials conducted by farmers working with the Iowa Soybean Association.

Iowa DNR MSIM - SGCN Modeling

Predictive occurrence maps for Species of Greatest Conservation Need (SGCN) using data from the MSIM program.

Systematic Sampling Example

An example for Stat421 Lab05.

iNtr: an interactive NRI table review tool

This is a shiny app tool designed for reviewing tables in Natural Resource Inventory reports.

viscover: visualize soil and crop data and their overlay

This is a shiny app tool designed for interacting with Cropland Data Layer and NRCS Soil Survey Data.

Selected Publications

Utilizing data from a long-term monitoring program and land cover data sets, we modeled the probability of occupancy and colonization for 38 bird Species of Greatest Conservation Need (SGCN) in the robust design occupancy modeling framework, and used results from the best models to predict occupancy and colonization on the Iowa landscape.
In PLOS ONE, 2017

Recent Posts

Anabelle introduced the NYC Squirrel Census data to me today. It also comes from the recommended dataset of #TidyTusday. Both of us adore squirrels 😍. The dataset contains variables which can tell when (Date) and where (longitude X and latitude Y) people saw a squirrel of certain age (Age) and fur color (Primary Fur Color) conducting some activities (Running, Climbing, Chasing, Eating, Foraging or Other Activities). Having some experience working with leaflet in R, I find it very interesting to visualize this data set on an interactive map.


个人网站上的第一篇中文博客献给值得纪念的2019年暑假, 响应谢老大的号召,我网故我在。 一个人的七天欧洲之旅 因为参加一个国际会议,我短暂拜访了


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Here is my solution to one of the 2018 google summer of code project tests. The source code and output are available at