Difference between revisions of "R/C2/Introduction-to-RStudio/English"

Opening slide

Objectives

• Workspace; Plots and Files window
• How to install packages of R

Pre-requisites

• Basic commands of R

If not, please locate the relevant tutorials on R on this website.

Systems requirements

• R version 3.2.3
• RStudio version 1.1.456

Install R version 3.2.0 or higher.

RStudio window

It is used to edit a script and run it.

It is used to install packages or to run a particular command.

Highlight Environment tab

It stores all the variables used during execution of commands under the Environment tab.

Point to the four-headed arrow.

A four-headed arrow symbol appears.

Now, in parentheses, type 1 comma 2 comma 3 comma 4.

Press Enter to execute this line.

Highlight the Plots tab

We will learn more about Working Directory later in this series.

The Plots tab shows all the graphical output.

Highlight the output plot

You can now see the plot in the Plots window.

Highlight broom-shaped icon in Environment

At the top of the Environment window, click on the broom icon.

Ensure that the box Include hidden objects is checked and click on Yes.

In the Console, again type plot testSample in parentheses as before.

Press Enter.

Highlight broom-shaped icon in Environment

Instead, we see:

Error in plot(testSample) : object 'testSample' not found

It means that the variable testSample has been removed from our Workspace.

So, you should be careful with this broom icon in the Environment window.

History tab

Highlight the commands

Here, we can see the lines that have been executed so far.

Type firstVar <- 6

Type secondVar <- 8

Press Enter.

Next, type second capital V a r space less than symbol followed by hyphen space 8.

Press Enter.

Press Ctrl+L

We need to clean the Console before moving on.

Click in the Console window and press Ctrl+L together.

To see this icon, place the cursor under the maximizer button of the Console window.

You will see a hand symbol and the text, Clear Console Ctrl+L.

Packages in R

• Stored under a directory called library in the R environment.

By default, R installs a set of packages.

Type library()

Press Enter.

Type install.packages("MASS")

Highlight the red dot at the right corner of Console

Now, MASS inside double quotes in parentheses.

Press Enter.

We will need to wait until R installs the package.

Select the Install Packages option

From the dropdown menu, select the Install Packages option.

Type library(MASS) in the Console window

We will load the MASS package now.

In the Console window, type library MASS in parentheses and press Enter.

Type f r a c t i o.

Point to the fractions option.

Press Enter to select.

fractions(firstVar/secondVar)

Highlight ¾ in the Console

In the Console window, type f r a c t i o.

RStudio shows the fractions option.

Press Enter to select it.

You can use this feature while typing commands.

Only remember that R is case-sensitive.

After fractions, type, in parentheses, firstVar division slash secondVar.

Press Enter.

You can see the reduced fraction ¾ in the Console.

Highlight the output in decimal

It gives the result in decimal form.

Summary

• Workspace; Plots and Files window
• How to install packages of R

Assignment

About the Spoken Tutorial Project

Please download and watch it.

Spoken Tutorial Workshops

Please contact us.

Forum to answer questions

Choose the minute and second where you have the question.

Explain your question briefly.

Someone from the FOSSEE team will answer them.

Please visit this site.

Forum to answer questions

Please visit the forum given in the link.

Textbook Companion

We give honorarium and certificates for those who do this.

For more details, please visit these sites.

Acknowledgement

Thank You

This is Vidhya Iyer from IIT Bombay signing off. Thanks for watching.