January 2021

covidcast package for COVID-19-related data

January 21, 2021 | kjytay

(This is a PSA post, where I share a package that I think that might be of interest to the community but I haven’t looked too deeply into myself.) Today I learnt of the covidcast R package, which provides access … Continue reading →
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AzureCosmosR: interface to Azure Cosmos DB

January 21, 2021 | Hong Ooi

by Hong Ooi Last week, I announced AzureCosmosR, an R interface to Azure Cosmos DB, a fully-managed NoSQL database service in Azure. This post gives a short rundown on the main features of AzureCosmosR. Explaining what Azure Cosmos DB is can be tricky, so here’s an excerpt from the ... [Read more...]

What is a Good Test Set Size?

January 20, 2021 | jmount

Introduction Teaching basic data science, machine learning, and statistics is great due to the questions. Students ask brilliant questions, as they see what holes are present in your presentation and scaffolding. The students are not yet conditioned to ask only what you feel is easy to answer or present. They […] [Read more...]

What is a Good Test Set Size?

January 20, 2021 | jmount

Introduction Teaching basic data science, machine learning, and statistics is great due to the questions. Students ask brilliant questions, as they see what holes are present in your presentation and scaffolding. The students are not yet conditioned to ask only what you feel is easy to answer or present. They […] [Read more...]

Plot predicted values for presences vs. absences

January 20, 2021 | A.M. Barbosa

Diagnostic plots are always a nice, visually explicit way to assess our data and predictions, and I’ve just added a new one to the modEvA R package. The ‘predPlot‘ function plots predicted values separated into observed presences and absences, and … Continue reading →
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The Mendoza line

January 20, 2021 | kjytay

The Mendoza Line is a term from baseball. Named after Mario Mendoza, it refers to the threshold of incompetent hitting. It is frequently taken to be a batting average of .200, although all the sources I looked at made sure … Continue reading →
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SwimmeR version 0.7.2 – Now Better than Ever

January 19, 2021 | Welcome to Swimming + Data Science on Swimming + Data Science

SwimmeR version 0.7.2 is now available from CRAN. This new version contains some new features, plus a few changes to make it more user-friendly. Let me show you what I’ve been working on.
library(SwimmeR)
library(dplyr)
library(stringr)
library(flextable)
library(rbenchmark)

flextable_style <- function(x) {
  x %>%
    flextable() %>%
    bold(part = "header") %>% # bold header
    bg(bg = "#D3D3D3", part = "header") %>% # puts gray background behind the header row
    align_nottext_col(align = "center", header = TRUE, footer = TRUE) %>% # center alignment
    autofit()
}
New Features SwimmeR can now parse S.A.M.M.S. style results. S.A.M....
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twitter for historic memory

January 19, 2021 | Jason Timm

Thoughts Timeline content Automated tweet-sizing of a thought Hashtags sans supervision Posting thread using rtweet Summary Thoughts A previous post here detailed a simple function (from the uspols package) for extracting the timeline of the Trump presidency from Wikipedia. In this post, then, we turn this timeline into a Twitter ... [Read more...]

Estimating the probability that a vaccinated person still infects others with Covid-19

January 19, 2021 | Economics and R - R posts

The estimated vaccine efficacies from the phase III clinical trials provide good information of how strongly a Covid-19 vaccine reduces the probability of a symptomatic Covid-19 infection in the vaccinated individual, e. g. 95% for the Biontech/Pfizer vaccine. However, the probability that a vaccinated person still becomes infected without symptoms ... [Read more...]

Create Return Triangle Plots with R

January 19, 2021 | Learning Machines

How lucrative stocks are in the long run is not only dependent on the length of the investment period but even more on the actual date the investment starts and ends! Return Triangle Plots are a great way to visualize this phenomenon. If you want to learn more about them ... [Read more...]
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