Generate an R icon on your desktop 
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How to generate R icon on your desktop?

      Click on the window icon

      --> [you will see a list]

      --> R

      --> [right click on one of the entries ]

      --> Choose 'Open file location'

      --> [Right click the R]

      --> [Go to desktop and paste it there]

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Generate an Spyder (Python) icon on your desktop 
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How to generate Spyder icon on your desktop?

      Click on the window icon

      --> Anacomda3(64-bit)

      --> [right click on Spyder(Anaconda3)]

      --> Choose 'Open file location'

      --> [Right click the file]

      --> [Go to desktop and paste it there]

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To find the preloaded packages, we can use the search() function. 

> search()
 [1] ".GlobalEnv"        "package:httr"      "package:stats"    
 [4] "package:graphics"  "package:grDevices" "package:utils"    
 [7] "package:datasets"  "package:methods"   "Autoloads"        
[10] "package:base"     
> 
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data set: Titanic
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> data('Titanic')
> x<-Titanic
> df<-data.frame(x)
> dim(df)
[1] 32  5
> head(df)
  Class    Sex   Age Survived Freq
1   1st   Male Child       No    0
2   2nd   Male Child       No    0
3   3rd   Male Child       No   35
4  Crew   Male Child       No    0
5   1st Female Child       No    0
6   2nd Female Child       No    0

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help(data)
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data {utils}	R Documentation

Data Sets

Description
   Loads specified data sets, or list the available data sets.

Usage
data(..., list = character(), package = NULL, lib.loc = NULL,
     verbose = getOption("verbose"), envir = .GlobalEnv,
     overwrite = TRUE)

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