Publications by Victor Ivamoto
Wine Type and Quality Prediction With Machine Learning
Preface This report is part of the capstone project of HarvardX’s Data Science Professional Certificate1 program. The R Markdown code used to generate this report and the PDF version are available on GitHub. The HTML version is available on RPubs. 1 Introduction HarvardX’s Data Science Professional Certificate program covers several steps in...
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Movie Recommendation System in R
Preface This report is part of the capstone project of HarvardX’s Data Science Professional Certificate1 program. The R Markdown code used to generate this report and the PDF version are available on GitHub. The HTML version is available on RPubs. 1 Introduction Recommendation systems plays an important role in e-commerce and online streaming ...
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Factor Analysis
Data Preparation Load libraries library(tidyverse, readxl) ## -- Attaching packages --------------------------------------------------- tidyverse 1.3.0 -- ## v ggplot2 3.3.2 v purrr 0.3.4 ## v tibble 3.0.3 v dplyr 1.0.2 ## v tidyr 1.1.2 v stringr 1.4.0 ## v readr 1.3.1 v forcats 0.5.0 ## -- Conflicts -----------------...
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Exploratory Factor Analysis
Install required packages wants <- c("GPArotation", "mvtnorm", "psych") has <- wants %in% rownames(installed.packages()) if(any(!has)) install.packages(wants[!has]) Factor analysis Factor analysis Simulate data Simulate data True matrix of loadings N <- 200 P <- 6 Q <- 2 (Lambda <- matrix(c(0.7,-0.4, 0.8,0, -0.2,0.9, -0.3,0.4, 0.3,0.7, -0....
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MET
#library(tidyverse) library(stringr) library(readxl) library(faraway) library(mctest) library(REdaS) ## Loading required package: grid library(psych) ## ## Attaching package: 'psych' ## The following object is masked from 'package:faraway': ## ## logit Carregar a tabela “original” tbl <- read_excel('original.xlsx') tbl ## # A ...
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Document
Importa pacote mctest library(mctest) Importa tabela de exemplo Hald Cement data(Hald) Hald ## y X1 X2 X3 X4 ## [1,] 78.5 7 26 6 60 ## [2,] 74.3 1 29 15 52 ## [3,] 104.3 11 56 8 20 ## [4,] 87.6 11 31 8 47 ## [5,] 95.9 7 52 6 33 ## [6,] 109.2 11 55 9 22 ## [7,] 102.7 3 71 17 6 ## [8,] 72.5 1 31 22 44 ## ...
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Testes de Colinearidade
Preparação dos dados Carrega as bibliotecas. library(tidyverse, readxl) ## -- Attaching packages -------------------------------------------- tidyverse 1.3.0 -- ## v ggplot2 3.3.2 v purrr 0.3.4 ## v tibble 3.0.3 v dplyr 1.0.2 ## v tidyr 1.1.2 v stringr 1.4.0 ## v readr 1.3.1 v forcats 0.5.0 ## -- Conflicts ---------...
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