Publications by Jacob Martin
DS 2870: Module 3 - Reordering groups in GGplot using the forcats package
Set Up Your Project and Load Libraries ## Set the default size of figures and default to printing the R code knitr::opts_chunk$set(fig.align = "center", echo = F, include = T) ## Load the libraries we will be using pacman::p_load(tidyverse, skimr) ## Changing the default theme to black/white ins...
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DS 1870: Homework 7 Key - Spring 2024
knitr::opts_chunk$set(echo = TRUE, message = F, warning = F, fig.align = "center") # load packages: typical - tidyverse and skimr # Classification - caret, rpart, rpart.plot pacman::p_load(tidyverse, skimr, caret, rpart, rpart.plot) # Setting the default theme...
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DS 2870: Homework 9 - Spring 2024 - Key
knitr::opts_chunk$set(echo = TRUE, message = F, warning = F, fig.align = "center") # load packages: typical - tidyverse and skimr # Classification - class, caret, rpart, rpart.plot pacman::p_load(tidyverse, skimr, class, caret, rpart, rpart.plot) theme_set(them...
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DS 2870: Homework 8 - Sp 2024 - key
Data Description: ESPN has a metric it uses to judge quarterback (QB) performance called Quarterback Rating, QBR, and how it is calculated is kept a secret. The qbr game stats.csv file has the QBR rating and game statistics for all quarterback and game performances. The columns in the qbr_df data set are: response variable - qbr: The quarterback...
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DS 1870: Module 6 Homework - Spring 2024 - Key
Data description ESPN has a metric it uses to judge a quarterback’s (QB) performance called Quarterback Rating (QBR), and how it is calculated is kept a secret. The qbr data.csv file has the QBR rating and game statistics for all quarterback and game performances. The columns in the csv file are: qbr (response variable): The quarterback ratin...
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STAT 5230: Chapter 13 - Factor analysis ML Method - Bones Example
knitr::opts_chunk$set(echo = TRUE, warning = F, message = F, fig.align = "center") options(digits=3) # Loading packages: tidyverse & moderndive pacman::p_load(tidyverse, corrplot, psych, MVN, GGally, ggrepel) # Changing the default theme to theme_bw() theme_set(theme_classi...
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STAT 5230: Chapter 13 - Factor analysis - Bones Example
Calculating the mahalanobis distance to look for outliers data.frame( x = 1:nrow(bones), y = mahalanobis(bones, center = colMeans(bones), cov = var(bones)) ) |> ggplot( mapping = aes(x = x, y = y) ) + geom_col() + geom_hline( yintercept = qchisq((nrow(bones)-0.5)/nrow(bones), df = p), color = "red" ...
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STAT 5230: Chapter 9 Lab - Solutions
knitr::opts_chunk$set(echo = TRUE, fig.width=10, fig.height=6, fig.align = "center") # Load the needed package(s) below: pacman::p_load(readxl, tidyverse, skimr, caret, GGally, class, rpart, rpart.plot) # Change the default theme below: theme_set(theme_clas...
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DS 1870: Homework 5.2 Solutions - Spring 2024
Data description ESPN has a metric it uses to judge a quarterback’s (QB) performance called Quarterback Rating (QBR), and how it is calculated is kept a secret. The qbr data.csv file has the QBR rating and game statistics for all quarterback and game performances. The columns in the csv file are: qbr (response variable): The quarterback ratin...
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DS 1870: Homework 4.2 Solutions - Spring 2024
Question 1 Blackjack is a card game where the player goes up against the dealer (not other players). A round of blackjack can end in one of three ways: “player” wins, “dealer” wins, or a “push” (tie). The goal of blackjack is to try to get as close of a point total of 21 as possible without going over (called a bust). If the player i...
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