rstats

Simulating Random Slopes
This tutorial has been moved to the tutorials section.
2019-01-09 1 min read rstats
Simulate from Existing Data
library(faux) library(tidyverse) I added a new function to the package faux to generate a new dataframe from an existing dataframe, simulating all numeric columns from normal distributions with the same mean and SD as the existing data and the same correlation structure as the existing data.
2018-12-29 2 min read rstats
Simulating Mixed Effects
This tutorial has been moved to the tutorials section.
2018-12-26 1 min read rstats
Pipes
library(tidyverse) Pipes are a way to order your code in a more readable format. Let’s say you have a small data table with 10 participant IDs, two columns with variable type A, and 2 columns with variable type B.
2018-12-22 4 min read rstats
Simulating Multiple Vectors
library(tidyverse) library(faux) I’m working on a package for simulations called faux. (Update: faux is now on CRAN!) The first function, rnorm_multi, makes multiple normally distributed vectors with specified relationships and takes the following arguments:
2018-12-22 2 min read rstats
Plot Comparison
library(tidyverse) I compared bar plots to violin plots in a recent talk to make the point that real data plotted with the full distribution make your effects look less impressive than minimalist bar charts that just show the means and standard errors, but give you a much better idea of what’s going on with your data.
2018-03-28 7 min read rstats
Multi-Row Headers
A student on our help forum recently asked for help making a wide-format dataset long. When I tried to load the data, I realised the first three rows were all header rows.
2018-02-22 5 min read rstats
How many raters do I need?
I’ve often wondered how many raters I need to sample to get reliable stimulus ratings. This will obviously depend on the stimuli and what they’re being rated for. If there is a lot of inter-rater variation or very little inter-stimulus variation, you will need more raters to generate mean ratings with any reliability.
2018-02-17 3 min read rstats
Solution Feedback
Download a simple demo .rmd/.html. I’d noticed that students were tending to just look at the hidden solutions and not try very hard to understand the exercises, so I wanted a way for them to check if they’re right, but not give them the answer immediately.
2017-11-15 4 min read rstats
Hidden Solutions
library(tidyverse) The R for Reproducible Scientific Analysis pages at software carpentry have a really nice interface for hiding and showing solutions to exercises. I’ve created my own lightweight solution that you can use in any html file, including those made by RMarkdown (e.
2017-10-21 2 min read rstats