Publications by Harold Nelson
Shuffle and Difference
Shuffle and Difference Harold Nelson 2024-07-04 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.1 ✔ tibble ...
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Scatterplot Failures
Scatterplot Saturation Harold Nelson 2024-06-25 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.1 ✔ tibble ...
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Visualizing Categorical Pairs
Visualizing Categorical Pairs Harold Nelson 2024-06-10 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.1 ✔ ti...
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Contingency Tables
Contingency Tables Harold Nelson 2024-06-04 Setup # install.packages("gmodels") # Just once library(gmodels) # Every Time load("comics.Rdata") CrossTable The method of constructing a contingency table given in the text is cumbersome and doesn’t give a convenient result. It is much better to use the CrossTable() function from the gm...
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Skimr
Skimr Harold Nelson 2024-06-04 Setup # install.packages("skimr") #Just once library(skimr) #Every Time load("comics.RData") Create Skimmed DF for comics skimmed = skim(comics) knitr::kable(skimmed) skim_type skim_variable n_missing complete_rate character.min character.max character.empty character.n_unique character.whitespace numer...
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Vectors
Vectors Table of contents Vectors Examples Larger from smaller Extending a Vector Setting and Using Names Vectors from rep() (Repeat) Vectors from seq() (Sequence) Vectors of Integers Elementwise Computation Pieces of Vectors The Recycling Rule A Number Vectors A vector in R is an ordered collection of values. The individual values in a vector m...
1057 sym Python (1442 sym/48 pcs)
Regression 2
Regression 2 Harold Nelson 4/3/2022 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3.2.1 ## �...
2370 sym Python (5891 sym/29 pcs) 9 img
Probability Lecture
Probability Lecture Harold Nelson 4/4/2024 Basic Concepts of Probability An event is a set of possible outcomes of an experiment.The probability of an event is what we expect its relative frequency to approach as we run the experiment a large number of times.These values can arise from several sources. Probabilities are always numbers in the ran...
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Feature Engineering
Feature Engineering Harold Nelson 2024-04-15 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3....
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Regression 1
Regression 1 Harold Nelson 3/21/2022 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3.2.1 ## �...
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