From 53b44459e71981cb21394210db00f1d9f765f073 Mon Sep 17 00:00:00 2001
From: nCarol595 <47037259+nCarol595@users.noreply.github.com>
Date: Fri, 28 Jun 2019 03:15:30 -0400
Subject: [PATCH] feat(guide):Added data frame guide article to R  (#35845)

* feat:Added guide article for R

* Start feat/add-guide-article-for-r
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+---
+title: Data Frames
+---
+
+## Data Frames
+
+A data frame is an object in R.
+
+### Creating a Data Frame
+
+You can create a data frame by combining vectors of the same length and using the function `data.frame`.
+```r
+a <- c(1 ,2, 3, 4, 5)   #vector a
+b <- c("H", "E", "L", "L", "O") #vector b
+c <- c(TRUE, FALSE, FALSE, TRUE, FALSE) #vector c
+
+df <- data.frame(a, b, c)
+```
+**NOTE**: You can also import data from a various data file such as a csv file to a data frame. See `Additional Resources` below for help with that.
+
+### Adding Columns
+
+To add a new column you can do `df$new_column_name`
+
+#### Example
+```r
+df$product <- 2 * df[,1]
+```
+
+You can alternatively have a vector with them same amount of elements as a column in `df` as use the function `cbind` to combine it to `df`.
+```r
+product <- c(2, 4, 6, 8, 10)
+df <- cbind(df, product)
+```
+Both ways will output the following table:
+```
+    a   b   c      product
+1   1   H   TRUE   2
+2   2   E   FALSE  4
+3   3   L   FALSE  6
+4   4   L   TRUE   8
+5   5   O   FALSE  10
+```
+
+### Removing Columns or Rows
+
+You can remove a column or row by using `$` to specify a specific column name and making it `NULL`.
+```r
+df$b <- NULL #column b in df is deleted
+```
+Alternatively you can delete a specific row by using `df[row,]` or delete a specific row by using `df[,column]`.
+
+#### Example
+```r
+df[1,] <- NULL #Deletes first row in df
+
+df[,2] <- NULL #Deletes second column in df
+```
+### Sources
+1. [DataMentor](https://www.datamentor.io/r-programming/data-frame/)
+2. [ListenData](https://www.listendata.com/2015/06/r-keep-drop-columns-from-data-frame.html)
+3. [PROGRAMMINGR](http://www.programmingr.com/examples/r-dataframe/add-delete-rows/)
+
+### Additional Resources
+1. [Data Frame Manipulation](http://www.cookbook-r.com/Manipulating_data/)
+2. [Working with data in RStudio](http://paldhous.github.io/ucb/2016/dataviz/week7.html)
+3. [Importing Data](https://www.datacamp.com/community/tutorials/r-data-import-tutorial)