Posts

Introduce Descrepancy Measures

This Blog is the notes for my recent project about reliability and model checking. Next I want to organize a little about one important concept in model checking - discrepancy measures.

Last updated on May 2, 2022 1 min read R

How to do Data Cleaning in R

This blog is trying to elaborate steps for cleaning the data. Since datasets varied, this blog could not cover all. Depedent on the data you’re using, different methods should be used.

Last updated on May 2, 2022 10 min read blog

Updating R Version Without missing packages

After updating to new R version (4.5) from old version, you have to re-install all packages by default. However, there’re some solution for that. Unix (MacOs, Linux) 1.Create a new folder in home directory to store the packages.

Last updated on Jul 4, 2021 1 min read blog

My New Shiny App Cut Score Consistency

-- knitr::include_app("https://jihongz.shinyapps.io/Cutscore-1/", height = 1200)

Last updated on May 2, 2022 1 min read Shiny

Academic Writing

This post is aimed to remind myself how to write articles with Academic Writing Style. The original article is from http://libguides.usc.edu/writingguide/academicwriting. I. The Big Picture Unlike fiction or journalistic writing,

Last updated on Jul 4, 2021 1 min read blog

Latent Profile Analysis using MCLUST (in R)

Hi there! This is Jihong. This is a webpage folked from JOSHUA M. ROSENBERG. It aims to provid a very clear example about how to conduct Latent Profile Analysis using MCLUST in r.

Last updated on May 2, 2022 3 min read R

Parental Involvement and Children Motivation

One big problem in education study is the longitudinal effect of explanatory factor is always ignored. One of the reasons is the requirements of longitudinal data hardly be met.

Last updated on Jul 4, 2021 2 min read blog

Big question I always found exploratory tools and confirmatory tools have distinct fans. The fans of exploratory tools believe the conclusion should be data-driven, nothing else beyond data is needed in order to keep object.

Last updated on Jul 4, 2021 2 min read blog

Simulation Study of Linking using mirt

This simulation study is to show how to do IRT Linking Process using mirt R Package. The simulation data includes 2 forms - Form A and Form B. These 2 forms are simulated based on 2 groups of individual, one group has 0 mean trait, another has 0.25 mean trait. Both groups have same sd.

Last updated on May 2, 2022 25 min read R, Mirt, Linking

Simulation of Lognormal distribution

This post is a try about how yo simulate lognormal distribution in R. Lognormal distribution is used a lot in cumulative data (e.x. counting), which is very similar with normal distribution except x should be larger than 0. For instance, the number of schools, the number of students. But I always have no idea about how to parameterized this distribution. I’ll update this post as I learn more about lognormal distribution…

Last updated on Jul 4, 2021 2 min read blog