Sakinashaikh: Created page with " {| border =1 |'''Time''' |'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Introduction to R script.''' |- || 00:06 || In this tutorial, you will learn |-..."

2020-05-08T07:15:00Z

Created page with " {| border =1 |'''Time''' |'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Introduction to R script.''' |- || 00:06 || In this tutorial, you will learn |-..."

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{| border =1
|'''Time'''
|'''Narration'''

|-
|| 00:01
|| Welcome to this tutorial on '''Introduction to R script.'''

|-
|| 00:06
|| In this tutorial, you will learn

|-
|| 00:09
|| How to work with an '''R script '''in '''RStudio'''

|-
|| 00:14
|| To understand this tutorial, you should know basic commands of '''R'''.

|-
|| 00:21
|| If not, please locate the relevant tutorials on '''R''' on this website.

|-
|| 00:28
|| This tutorial is recorded on

|-
|| 00:32
|| '''Ubuntu Linux OS 16.04'''

|-
|| 00:37
|| '''R '''version''' 3.2.3 '''

|-
|| 00:42
|| '''RStudio''' version''' 1.1.456'''

|-
|| 00:48
|| Install '''R''' version '''3.2.0''' or higher.

|-
|| 00:54
|| An '''R script''' is a plain '''text file''' in which you save your '''R code'''

|-
|| 00:01
|| '''Script '''allows you to show your work to others, and also reproduce and modify the results

|-
|| 01:10
|| Before you begin please create a folder named '''myProject '''on '''Desktop'''.

|-
|| 01:17
|| I have already created this folder on my '''Desktop'''.

|-
|| 01:23
|| I shall now save all my '''scripts '''and '''data sets '''in this folder.

|-
|| 01:30
|| Later, I shall set this folder as my '''Working Directory'''.

|-
|| 01:37
|| Let us switch to '''RStudio'''.

|-
|| 01:40
|| We will close these two tabs named '''Untitled1 '''and '''R packages available'''.

|-
|| 01:49
|| Click on the small cross symbol next to these tabs

|-
|| 01:55
|| We will now create a new '''R script'''.

|-
|| 01:59
|| In the top left corner of '''RStudio, '''click on the green '''plus sign. '''

|-
|| 02:05
|| Now from the dropdown menu, select '''R Script'''.

|-
|| 02:11
|| A new '''R script''' appears in the '''Source''' window.

|-
|| 02:17
|| You can also create a new '''R script''' by pressing '''Ctrl+Shift+N''' together.

|-
|| 02:24
|| Let us save this '''R''' '''script''' first.

|-
|| 02:28
|| In the top left corner of the screen, click on the '''File''' option.

|-
|| 02:36
|| Then click on '''Save''' to save the script.

|-
|| 02:40
|| Select the directory where you want to save your '''R script'''.

|-
|| 02:46
|| I am saving the '''script '''in the folder '''myProject''' on my '''Desktop''',''' '''with the name '''myfirstscript.'''

|-
|| 02:56
|| Finally, click on the '''Save''' button.

|-
|| 03:01
|| Now you can see that the file is named as '''myfirstscript.R'''.

|-
|| 03:07
|| '''RStudio''' automatically adds '''dot R''' at the end of the filename.

|-
|| 03:15
|| Now, let us write some lines of code in the '''script''' file '''myfirstscript.R'''.

|-
|| 03:23
|| We will create a '''vector''' named '''testSample''' with one two three four as its '''elements'''.

|-
|| 03:33
|| We have already learned how to create '''vectors''' earlier in this series.

|-
|| 03:39
|| In the '''Source '''window, type '''testSample''' space '''less than''' symbol.

Now type '''hyphen space c 1 comma 2 comma 3 comma 4 '''in''' parentheses.''' Press Enter

|-
|| 03:59
|| You may also use '''equal''' sign in place of '''less than''' symbol followed by '''hyphen'''.

|-
|| 04:08
|| In the '''Source '''window, to the left of the checkbox '''Source on Save, ''' click on the '''Save''' icon Or, press '''Ctrl+S '''together to save the file.

|-
|| 04:22
|| We will now use the '''print function''' to display the values in '''testSample''' '''vector.'''

|-
|| 04:30
|| In the '''Source '''window, type p r i

|-
|| 04:35
|| '''RStudio''' automatically starts suggesting different '''functions'''.

|-
|| 04:41
|| You can navigate this list of '''functions''' by using the '''up (↑)''' and '''down (↓)''' arrow keys on the keyboard.

|-
|| 04:50
|| To select a particular '''function''', just press '''Enter'''.

|-
|| 04:56
|| Finish typing''' print testSample '''in '''parentheses '''and press '''Enter'''.

|-
|| 05:04
|| Now let’s save the file and '''run''' it with these two lines only.

|-
|| 05:11
|| Now, we maximize the '''Source '''window.

|-
|| 05:15
|| In the top right corner of the '''Source '''window, click on the '''Source '''button.

|-
|| 05:22
|| You can see the line-by-line execution of the '''script''' in the '''Console'''.

|-
|| 05:29
|| You can also run the '''script '''by pressing '''Ctrl+Shift+Enter together'''.

|-
|| 05:36
|| For this, you need to first click in the '''script '''window.

|-
|| 05:42
|| Now let’s declare a '''variable firstVar''' with value of ten''' '''in the '''Source''' window.

|-
|| 05:50
|| Type''' firstVar''' with capital V space '''equal''' sign space 10 and press '''Enter. '''

|-
|| 06:00
|| Please note that '''R''' language is case-sensitive.

|-
|| 06:05
|| We will now use the '''print function '''to show the value of '''firstVar'''.

|-
|| 06:11
|| In the '''Source '''window, type '''print'''.

|-
|| 06:16
|| I am typing only '''p r i n '''but the options appear and I select '''print '''from there.

|-
|| 06:28
|| Now in '''parentheses''', start typing '''firstVar. '''

|-
|| 06:32
|| '''RStudio''' shows '''firstVar'''; press '''Enter''' to select it.

|-
|| 06:39
|| Press '''Enter''' to go to the next line.

|-
|| 06:43
|| Now let’s declare another '''variable secondVar''' with value of fifteen.

|-
|| 06:50
|| In the '''Source''' window, type''' secondVar''' space '''equal''' sign space 15 and press '''Enter'''.

|-
|| 07:01
|| Now, as shown before, type '''print''' '''secondVar''' in '''parentheses''' to show its value and press '''Enter'''
|-
|| 07:13
|| We can add '''comments''' to our code by using '''# hash '''symbol followed by our '''comment'''.

|-
|| 07:22
|| Type''' hash''' symbol space '''Creating an R script''' before the declaration of '''testSample vector.'''

|-
|| 07:32
|| '''R '''interprets each line of code.

|-
|| 07:36
|| Please make sure that your '''comment''' and the first line of code appear in separate lines.

|-
|| 07:46
|| Now, let’s '''comment''' the line '''print(secondVar)'''.

|-
|| 07:50
|| To do that, first click on this line.

|-
|| 07:56
|| Then from the top menu bar of '''RStudio''',''' '''click on the '''Code''' option.

|-
|| 08:04
|| From the dropdown menu, click on the '''Comment/Uncomment Lines '''option.

|-
|| 08:10
|| This option helps us to '''comment''' as well as '''uncomment''' a line.

|-
|| 08:17
|| On doing so, we see a '''hash '''symbol with space.

|-
|| 08:24
|| For now, we will '''uncomment print(secondVar)''' and save our '''script'''.

|-
|| 08:30
|| Delete '''# hash''' symbol at the beginning of this line.

|-
|| 08:35
|| Now let’s '''run''' the '''script''' file.

|-
|| 08:38
|| In the top right corner of the '''Source''' window, click on the '''Source '''button.

|-
|| 08:45
|| Now maximize the '''Console'''.

|-
|| 08:50
|| The line-by-line execution of the '''script '''is shown in the '''Console '''window.

|-
|| 08:56
|| The '''sample vector [1 2 3 4] '''is printed.

|-
|| 09:02
|| The values of two '''variables,''' 10 and 15 are printed.

|-
|| 09:08
|| We will clear the '''Console''' by clicking on the broom icon.

|-
|| 09:15
|| Now, we minimize the '''Console '''window.

|-
|| 09:19
|| Now let’s move ahead.

|-
|| 09:23
|| Suppose, we want to run only a '''block of code '''after '''print(testSample) '''from the file '''myfirstscript.R. '''

|-
|| 09:34
|| First, select or highlight the''' block of code''', starting from '''firstVar''' '''equals 10 '''to the end.

|-
|| 09:44
|| Then in the top right corner of the '''Source '''window, click on the '''Run '''button with an arrow.

|-
|| 09:53
|| Now you can see the output of only the highlighted part of the code in the '''Console''' window.

|-
|| 10:00
|| The output shows the values of two '''variables, '''10 and 15 only.

|-
|| 10:07
|| You can also run a particular '''block''' by highlighting it and pressing '''Ctrl+Enter''' together.

|-
|| 10:16
|| We will clear the '''Console''' window by clicking on the broom icon.

|-
|| 10:23
|| Now let us create another '''R script'''.

|-
|| 10:28
|| Use '''Ctrl+Shift+N''' to open a new '''script'''.

|-
|| 10:33
|| Save this '''script''' in the same folder '''myProject''' with the name '''mysecondscript.'''

|-
|| 10:43
|| Now let’s learn how to load''' myfirstscript.R''' into '''mysecondscript.R'''.

|-
|| 10:53
|| Go to''' myfirstscript.R '''and run it by clicking on the '''Source''' button.

|-
|| 11:02
|| In the '''Console''' window, scroll up to locate the '''source''' for this '''script'''.

|-
|| 11:09
|| Copy it without the '''symbol. '''

|-
|| 11:14
|| Now let’s get back to our new '''script mysecondscript.R'''

|-
|| 11:20
|| Paste what we have just copied, at the top of the''' script mysecondscript.R '''

|-
|| 11:29
|| We can press '''Enter''' after comma for better visibility.

|-
|| 11:35
|| Next, write one more line to ensure that the execution is from this '''script''' only.

|-
|| 11:43
|| In the '''Source''' window, type '''print '''and then the following words in''' parentheses.'''

|-
|| 11:51
|| In double quotes''', Script space loaded.'''

|-
|| 11:56
|| Press''' Enter. '''

|-
|| 11:58
|| Save the '''script.'''

|-
|| 12:01
|| Let us clear the '''Console '''again by clicking on the broom icon.

|-
|| 12:09
|| Now run the '''script''' by pressing '''Ctrl+Shift+Enter''' together.

|-
|| 12:16
|| Maximize the '''Console '''window.
|-
|| 12:20
|| You can see the output in the '''Console''' window and verify the results.

|-
|| 12:27
|| Now, we minimize the '''Console ''' window.

|-
|| 12:30
|| This brings us to the end of this tutorial. Let us summarize.

|-
|| 12:37
|| We have learned

|-
|| 12:39
|| How to create, save and run an '''R script'''

|-
|| 12:44
|| We now suggest an assignment.

|-
|| 12:47
|| Create a '''script''' and save it on '''Desktop''' as '''testscript.R '''

|-
|| 12:54
|| Load '''myfirstscript.R''' in this '''script '''and run it.

|-
|| 13:00
|| The video at the following link summarises the Spoken Tutorial project.
Please download and watch it.

|-
|| 13:10
|| We conduct workshops using Spoken Tutorials and give certificates.
Please contact us.

|-
|| 13:18
|| Do you have questions in THIS '''Spoken Tutorial?'''

|-
|| 13:18
|| Choose the minute and second where you have the question. Explain your question briefly.

|-
|| 13:31
|| Someone from the '''FOSSEE''' team will answer them. Please visit this site.

|-
|| 13:37
|| Do you have any general / technical questions? Please visit the forum given in the link.

|-
|| 13:45
|| The '''FOSSEE ''' team coordinates coding of solved examples of popular books. We give honorarium and certificates to those who do this. For more details, please visit these sites.

|-
|| 14:00
|| The Spoken Tutorial project is funded by MHRD, Govt. of India

|-
|| 14:08
|| The script for this tutorial was contributed by Shaik Sameer (FOSSEE Fellow 2018).

This is Sudhakar Kumar from IIT Bombay signing off. Thanks for watching.
|-
|}

R/C2/Introduction-to-R-script/English-timed - Revision history

Sakinashaikh: Created page with " {| border =1 |'''Time''' |'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Introduction to R script.''' |- || 00:06 || In this tutorial, you will learn |-..."