Publications by Eric Lehmphul
DATA624: Homework 5
Code Show All Code Hide All Code DATA624: Homework 5 DATA624: Homework 5 Task Exercises 8.1 8.5 8.6 8.7 8.8 8.9 Eric Lehmphul 2/28/2023 library(fpp3) ## -- Attaching packages ---------------------------------------------- fpp3 0.5 -- ## v tibble 3.1.6 v tsibble 1.1.3 ## v dplyr 1.0.7 v tsibbledata 0.4.1 ## v tidy...
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DATA624: Homework 4
Code Show All Code Hide All Code DATA624: Homework 4 DATA624: Homework 4 Task 3.1 3.2 Eric Lehmphul 2/25/2023 library(tidyverse) library(GGally) library(corrplot) library(ggpubr) library(naniar) library(mice) Task Do problems 3.1 and 3.2 in the Kuhn and Johnson book Applied Predictive Modeling. Please submit your Rpubs link along w...
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DATA624: Homework 3
Code Show All Code Hide All Code DATA624: Homework 3 DATA624: Homework 3 Task Exercises 5.1 5.2 5.3 5.4 5.7 Eric Lehmphul 2/16/2023 library(fpp3) ## -- Attaching packages ---------------------------------------------- fpp3 0.5 -- ## v tibble 3.1.6 v tsibble 1.1.3 ## v dplyr 1.0.7 v tsibbledata 0.4.1 ## v tidyr ...
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DATA624: Homework 2
Code Show All Code Hide All Code DATA624: Homework 2 DATA624: Homework 2 Task Exercises 3.1 3.2 3.3 3.4 3.5 3.7 3.8 3.9 Eric Lehmphul 2/6/2023 library(fpp3) library(ggpubr) library(seasonal) Task Do exercises 3.1, 3.2, 3.3, 3.4, 3.5, 3.7, 3.8 and 3.9 from the online Hyndman book. Please include your Rpubs link along with your .rmd f...
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DATA 608: Assignment 1
DATA608: Assignment 1 Eric Lehmphul 09/11/2022 library(tidyverse) Principles of Data Visualization and Introduction to ggplot2 I have provided you with data about the 5,000 fastest growing companies in the US, as compiled by Inc. magazine. lets read this in: inc <- read.csv("https://raw.githubusercontent.com/charleyferrari/CUNY_DATA_608/mast...
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DATA622: Homework 1
library(tidyverse) library(ggpubr) library(caret) library(class) library(lubridate) library(MASS) library(BBmisc) library(rpart) library(fastDummies) library(rpart.plot) Data Exploration Read in Data I elected to use the 100 record and 50,000 record datasets from https://excelbianalytics.com/wp/downloads-18-sample-csv-files-data-sets-f...
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DATA 608: Final Project Proposal
DATA608: Final Project Proposal DATA608: Final Project Proposal Objective Methodology Data Sources Regular Season Data Playoff Data Eric Lehmphul 10/23/2022 Objective For my final project, I intend on building a web based application of NHL regular season and post season data to explore: What is most important for a team to advance to t...
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DATA 622: Homework 2
Code Show All Code Hide All Code DATA622: Homework 2 DATA622: Homework 2 Exploratory Analysis Data Source Summary Statistics Check the Target Variable Distribution Data Distributions Modeling Decision Trees Random Forest Model Comparisons Conclusion Eric Lehmphul 10/20/2022 library(tidyverse) library(ggpubr) library(skimr) ...
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DATA 622: PCA Example
Code Show All Code Hide All Code PCA: Dimensionality Reduction Classification using Iris Dataset PCA: Dimensionality Reduction Classification using Iris Dataset Objective Create Data Partition Run PCA on Training Data and Transform Testing Data Model 1: Multinomial Logistic Regression using all variables in Training ...
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DATA 622: Homework 3
Code Show All Code Hide All Code DATA622: Homework 3 DATA622: Homework 3 Data Exploration Data Source Data Preparation Summary Statistics Check the Target Variable Distribution Data Distributions Unsupervised Methods Assignment 2: Decision Tree and Random Forest Modeling Decision Trees Random Forest Assignment 3: Sup...
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