Developing Data Products course - Assignment Week 2 - R Markdown Presentation & Plotly

Introduction

This document shows an example of making a web presentation with graphics, using R Markdown (http://rmarkdown.rstudio.com), Slidy and Ploty (https://plot.ly/) together, corresponding to the assigment of the week 3, Developing Data Products course from Coursera (https://www.coursera.org/learn/data-products)

Data used by the example is the “Iris Data Set”. This dataset contains 3 classes of 50 instances each, where each class refers to a type of iris plant.

This presentation will show a scatter plot where X-Axis will be the column “Sepal.Length”, Y-Axis the column “Sepal.Width”, and the dots’ colors will be based on the column “Petal.Length”.

Dataset

# Loading dataset
data("iris")

head(iris)
##   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
## 1          5.1         3.5          1.4         0.2  setosa
## 2          4.9         3.0          1.4         0.2  setosa
## 3          4.7         3.2          1.3         0.2  setosa
## 4          4.6         3.1          1.5         0.2  setosa
## 5          5.0         3.6          1.4         0.2  setosa
## 6          5.4         3.9          1.7         0.4  setosa

Plot

library(plotly)
## Loading required package: ggplot2
## 
## Attaching package: 'plotly'
## The following object is masked from 'package:ggplot2':
## 
##     last_plot
## The following object is masked from 'package:stats':
## 
##     filter
## The following object is masked from 'package:graphics':
## 
##     layout
plot_ly(iris, x = ~Sepal.Length, y = ~Sepal.Width, 
        type = "scatter", mode = "markers", color = ~Petal.Length)