R Programming using RTVS – Part 4

This article assumes that you have RTVS extension added to your VS IDE.  You can refer my previous blogs on installation & configuration of RTVS.

  1. R Support in Visual Studio (RTVS)
  2. R Programming using RTVS – Part 2
  3. R Programming using RTVS – Part 3
Prerequisites:
1. Basic knowledge of R programming
2. RTVS Extension

Creating R projects using RTVS

Create a project in visual studio using R template.

RTVS_2

Open the Script.R file from solution explorer and type in your R program. In the example below, we create a simple line graph that compares sales and profit performance of a company over a period of 5 years.

#Define Data
sales <- c(2000, 3500, 3000, 4700, 6000)
profit <- c(1450, 2600, 750, 2000, 3750)
#range for axis
rnge <- range(0, sales, profit)
#Plot sales values
plot(sales, type = "o", col = "green", ylim = rnge, axes = FALSE, ann = FALSE)
#draw profit values as line
lines(profit, type = "o", pch = 22, lty = 2, col = "red")
box()
#draw X axis and y axis
axis(1, at = 1:5, lab = c("2013", "2014", "2015", "2016", "2017"))
axis(2, las = 1, at = 1000 * 0:rnge[2])
#Graph Title
title(main = "Sales by Year", col.main = "blue", font.main = 4)
#add axis labels
title(xlab = "Year", col.lab = rgb(0, 0, 1))
title(ylab = "Amount", col.lab = rgb(0, 0, 1))

Place your cursor in the first line of code and use Ctrl+Enter to step through each line to R Interactive and execute. You can see each line execution results to the R Plot window as shown below

RTVS_5_R_prioject

Here is the final plot view

RTVS_5_R_prioject_plot

Given below is an updated source which generate the output as PDF file

#Define Data
sales <- c(2000, 3500, 3000, 4700, 6000)
profit <- c(1450, 2600, 750, 2000, 3750)

#File name to save output
pdf(file = "sales_and_profit_byYr.pdf", height = 4, width = 5)

#range for axis
rnge <- range(0, sales, profit)

#Plot sales values
plot(sales, type = "o", col = "green", ylim = rnge, axes = FALSE, ann = FALSE)
#draw profit values as line
lines(profit, type = "o", pch = 22, lty = 2, col = "red")
box()

#draw X axis and y axis
axis(1, at = 1:5, lab = c("2013", "2014", "2015", "2016", "2017"))
axis(2, las = 1, at = 1000 * 0:rnge[2])

#Graph Title
title(main = "Sales by Year", col.main = "blue", font.main = 4)

#add axis labels
title(xlab = "Year", col.lab = rgb(0, 0, 1))
title(ylab = "Amount", col.lab = rgb(0, 0, 1))

#Flush the output to PDF file
dev.off()
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R Programming using RTVS – Part 3

This article assumes that you have RTVS extension added to your VS IDE.  You can refer my previous blogs on installation & configuration of RTVS.

  1. R Support in Visual Studio (RTVS)
  2. R Programming using RTVS – Part 2
Prerequisites:
1. Basic knowledge of R programming
2. RTVS Extension

Key RTVS features that a developer should be aware of :

The following is just a list for you to explore rather than extensive walk through.

  1. Step through :  use Ctrl+Enter
  2. Execute a block of code in R interactive  : Select a block of code and Ctrl+ Enter (or right click and choose Execute in Interactive)
  3. Debug : Use Debug > Source startup file or F5
  4. Set Debug points : Native VS behavior (refer image below)rtvs_5_r_debug.png
  5. Reset current work space : To clear everything by using R Tools > Session > Reset
  6. Examine variables : Use ‘variable explorer’ (Ctrl + 8)
  7. IntelliSense : RTVS_5_R_IntelliSense
  8. Help : Use ? and ?? (Use ?? to search term in quotes if it include spaces)
  9. Code snippet manager :  View them at Tools > Code Snippets Manager.  RTVS_5_R_CodeSnipptType the abbreviated name and use tab to insert a snippet to your codeRTVS_5_R_CodeSnippt1
  10.  R interactive window or REPL (Read-Evaluate-Print-Loop) window : Use already illustrated in previous steps/posts
  11. Plot window : Ctrl + 6
  12. Plot history : Preserves all your plots in the session.  R Tools > Plots > Plot History Window (refer image below)RTVS_5_R_Plot_history

There are many more which an R programmer or VS developer can explore themselves. We will go through some samples using RTVS in the upcoming posts.

R Programming using RTVS – Part 2

This article assumes that you have RTVS extension added to your VS IDE.  You can refer my previous blog on installation & configuration of RTVS.

Prerequisites:
1. Basic knowledge of R programming
2. RTVS Extension

Once you install ‘Data Science and Analytical Applications’ workload using VS2017 installer (May 2017 update), new R Project template will be available for creating new project.

RTVS_2

Those who are familiar with R Studio will certainly find themselves home with this IDE. Additionally we have all VS native features. Given below is a view that shows Solution Explorer, Script file (Script.R) and Interactive Window (Microsoft R Client which is equivalent to console in R Studio)

RTVS_3

Notice that there is an ‘R Plot’ tab which is where the plots/visualizations will be generated.

To start with lets draw a basic plot

ds <- c(1,500,300,100,350)
plot(ds)

RTVS_4.png

Alternately use the normal VS debug (starting new instance) and watch the interactive window as the plot is generated.

ds <- c(1,500,300,100,350) > plot(ds)
> rtvs::debug_source("~/visual studio 2017/Projects/rproject1/rproject1/script.R")
Sourcing: c:\users\geek2\documents\visual studio 2017\Projects\rproject1\rproject1\script.R
>

That’s basic start. I recommend R developers to explore the VS menu “R Tools” for the complete set of R integration options available.