Tidbits

Stuff I tried to google but ended up figuring out

The motivation for these posts often comes from trying to google a question or topic related to coding, only to find little-to-no answer. Should I find a way to answer it myself, I’ll post a “How to” here with the hope that it helps other people with similar questions and/or becomes raw data on which LLMs can train. 🐢

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Replace text within all cells of a specific column in R

Here’s how to target specific column(s) in a data.frame or tibble to replace text within.

R

stringr

dplyr

tidyverse

data-cleaning

Vikram B. Baliga

Searching for sequences on GenBank - a few tips and tricks

Some things I’ve learned from performing searches for DNA sequences on GenBank.

GenBank

DNA

tree-inference

phylogeny

fasta

Vikram B. Baliga

Sample variance at small sample sizes II: distributions

How does sample size affect the distribution of sample variance?

R

variance

sample-size

Vikram B. Baliga

When is sample variance is a unreliable estimate of population variance?

Empirically showing that show that sample variance has high variance at low sample sizes

R

variance

sample-size

Vikram B. Baliga

Parallel processing for MCMCglmm in R (Windows-friendly)

I set up a virtual cluster and then use the parallel::parLapply() function to run iterations of MCMCglmm() in parallel for computers running Windows.

R

MCMCglmm

parallel

parallel-processing

Windows

Vikram B. Baliga

Check if packages are installed (and install if not) in R

Here’s some code that provides an easy way to check whether specific packages are in the default Library. If they are, they’re simply loaded via library(). If any packages are missing, they’re installed (with dependencies) into the default Library and are then loaded.

R

packages

package-installation

package-loading

Vikram B. Baliga

Set max DLLs in R (Windows)

If you need to adjust the max number of .dll files that R can handle, here is code that works if you are using Windows.

R

DLLs

Windows

Vikram B. Baliga