2021-08-04-plot-data-from-csv.Rmd

---
description: How to Plot CSV Data in ggplot2 with Plotly.
name: Plot CSV Data
permalink: ggplot2/plot-data-from-csv/
thumnail_github: csv.png
layout: base
language: ggplot2
display_as: advanced_opt
page_type: u-guide
order: 1
output:
  html_document:
    keep_md: true
---

```{r, echo = FALSE, message=FALSE}
knitr::opts_chunk$set(message = FALSE, warning=FALSE)
```

## Plot from CSV

When reading in files most often `stringsAsFactors = FALSE` is used. This setting ensures that non-numeric data (strings) are not converted to factors.

A factor is similar to a category. However factors can be numerically interpreted (they can have an order) and may have a level associated with them.
```{r}
library(plotly)
require(ggplot2)

df <- read.csv("https://raw.githubusercontent.com/plotly/datasets/master/iris-data.csv",
      stringsAsFactors = FALSE)

p <- ggplot(data=iris, aes(x = Sepal.Length, y = Sepal.Width)) 
p <- p + geom_point(aes(color=Species, shape=Species)) +
  xlab("Sepal Length") +  ylab("Sepal Width") +
  ggtitle("Sepal Length-Width")

ggplotly(p)
```


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