# Lesson 6. Create interactive plots in R - time series & scatterplots using plotly and dygraphs

## Learning objectives

After completing this tutorial, you will be able to:

- Create an interactive time series plot using
`plot.ly`

in`R`

- Create an interactive time series plot using
`dygraphs`

in`R`

## What you need

You will need a computer with internet access to complete this lesson and the data for week 4 of the course.

In this lesson we will explore using 2 interactive tools to create interactive plots of our data:

`plotly`

and`dygraphs`

First, we will load all of the needed libraries.

```
# install plotly from git - ropensci
#devtools::install_github('ropensci/plotly')
# load libraries
library(ggplot2)
library(xts)
## Error in library(xts): there is no package called 'xts'
library(dygraphs)
## Error in library(dygraphs): there is no package called 'dygraphs'
library(plotly)
## Error in library(plotly): there is no package called 'plotly'
options(stringsAsFactors = FALSE)
```

Next, let’s import some time series data

```
discharge_time <- read.csv("data/week_02/discharge/06730200-discharge-daily-1986-2013.csv")
discharge_time$datetime <- as.Date(discharge_time$datetime, format="%m/%d/%y")
```

We can plot the data using ggplot().

```
annual_precip <- ggplot(discharge_time, aes(x=datetime, y=disValue)) +
geom_point() +
labs(x = "Time",
y = "discharge value",
title = "my title")
annual_precip
```

## Time series - plotly

We can use `plotly`

to create an interactive plot that we can use in the `R`

console.

```
# create interactive plotly plot
ggplotly(annual_precip)
```

## Time series - dygraph

`Dygraph`

is a powerful and easy to use interactive time series plot generator. Below, notice how we can quickly create a `dygraph`

interactive plot. The output format of the plot is `html`

so it won’t work with a `pdf`

`rmd`

output but it will work with `html`

!

```
# interactive time series
library(dygraphs)
## Error in library(dygraphs): there is no package called 'dygraphs'
# create time series objects (class xs)
library(xts)
## Error in library(xts): there is no package called 'xts'
# create time series object
discharge_timeSeries <- xts(x = discharge_time$disValue,
order.by = discharge_time$datetime)
## Error in xts(x = discharge_time$disValue, order.by = discharge_time$datetime): could not find function "xts"
```

Then you can call the `dygraph()`

function to create your interactive time-series plot.

```
# create a basic interactive element
interact_time <- dygraph(discharge_timeSeries)
interact_time
```

```
# create a basic interactive element
interact_time2 <- dygraph(discharge_timeSeries) %>% dyRangeSelector()
interact_time2
```

## Leave a Comment