Data Science

# Introduction to R

4.56 (668 Ratings)

Beginner

Skill level

Free

Course cost

R is a comprehensive statistical and graphical programming language which is fast gaining popularity among data analysts. It is free and runs on a variety of platforms including Windows, Unix, and macOS. It provides an unparalleled platform for programming new statistical methods in an easy and straightforward manner.

#### Skills covered

• R commands
• R packages
• R functions
• Debug
• profile R code

## Course Syllabus

#### Intro to R

• Introduction to R
• R Commands
• R Objects.
• Data Frames.
• List and R Packages
• Importing Data in R.
• Saving Work in R and scrapping

## Course Certificate

Get Introduction to R course completion certificate from Great learning which you can share in the Certifications section of your LinkedIn profile, on printed resumes, CVs, or other documents.

## Discussion on Introduction to R

###### Mayur Mahipalsingh Pardeshi

20 July 2020, 3:30 AM

I’m not able to start learn due to access problem already logged in but error coming about batch not started kindly help me to enroll in this course

###### Nikhil Jain

20 July 2020, 6:38 AM

Hi Mayur,

###### Srinivas Rao

17 July 2020, 12:44 PM

How do you add color to a bar graph in R?

###### Maria

17 July 2020, 12:58 PM

Let’s say, you create a bar-plot using ggplot2:
ggplot(data = diamonds,aes(x=cut)) + geom_bar() Now, there are two ways to add color to these bars. Either you can use ‘fill’ as an attribute inside geom_bar() function of ‘fill’ as an aesthetic in ass() layer.
ggplot(data = diamonds,aes(x=cut)) + geom_bar(fill=“palegreen4”)
With this command, we are using ‘fill’ as an attribute.
Now, let’s use ‘fill’ as an aesthetic:
ggplot(data = diamonds,aes(x=cut,fill=cut)) + geom_bar()

###### Simran A

17 July 2020, 12:32 PM

I need to save R objects into JSON format. What package do I need to use for this?

###### Tanuja Bahirat

17 July 2020, 12:40 PM

1. Install rjson Package. In the R console, you can issue the following command to install the rjson package.
2. Input Data. Create a JSON file by copying the below data into a text editor like notepad.
4. Convert JSON to a Data Frame.
###### Simran

17 July 2020, 11:17 AM

Can you use R-squared to evaluate forecasted data correlation?

###### Tobias

17 July 2020, 11:35 AM

We cannot use R-squared to determine whether the coefficient estimates and predictions are biased, which is why you must assess the residual plots. R-squared does not indicate if a regression model provides an adequate fit to your data.

A good model can have a low Rsquare Value. The coefficient of correlation is the “R” value which is given in the summary table in the Regression output. R square is also called the coefficient of determination.
Multiply R times R to get the R square value.
In other words, the Coefficient of Determination is the square of Coefficient of Correlation.

###### Meena Kumar

17 July 2020, 10:11 AM

How can I swap the rows and columns of an R object?

###### Maria

17 July 2020, 10:32 AM

The transpose (reversing rows and columns) is perhaps the simplest method of reshaping a dataset.

Use the t() function to transpose a matrix or a data frame. In the latter case, row names become variable (column) names.

###### Srinivas Rao

17 July 2020, 10:05 AM

Is Python better than R for data science?

###### Maria

17 July 2020, 10:34 AM

Python is Object oriented programming language, it is easier to debug a python program.

Python is open source and simple/easy to learn.

Now rather than figuring out if R or Python is better, it is more important to understand the techniques that are involved in executing these tools. These tools are more of communication to us, where in we instruct the tools in order to execute the models we need the results for. In that case, both R and Python does good job and has unique values.

Ex: For various Machine learning models and visualization.

If the focus is only on data analysis, then i would say both R and Python are equally good. But python being a object oriented language, and if you are object oriented programmer already, then Python is better.

As the world is emerging with IT programmers, the developers community know object oriented programming and hence the adoption of data science techniques using python is much easier.

In the recent past, there has been huge adoption of python in data science.

###### Srinivas Rao

17 July 2020, 10:04 AM

Is ResNet one of the R-CNN model?

###### Yashraj Tambe

03 August 2020, 2:18 PM

In short ResNet is a CNN model.R-CNN is a bigger concept which has/uses ResNet in it as well other classical CNN models

###### Tanuja Bahirat

17 July 2020, 9:57 AM

Is there any free PDF to learn R for data science?

###### Tanuja Bahirat

17 July 2020, 9:57 AM

What are R commands?

###### Meena Kumar

17 July 2020, 10:10 AM

An R script is simply a text file containing (almost) the same commands that you would enter on the command line of R. ( almost) refers to the fact that if you are using sink() to send the output to a file, you will have to enclose some commands in print() to get the same output as on the command line. 