1. Code is on the Website Outline Comparison of Excel and R
R Coding Example
RStudio Environment
Getting Help
Entering Data
Calculating
Basic Plots
Save a Coding Script
Code is on the Website

2. Brief Review of Excel Active Spreadsheet Area
Most Everything is Point-and-Click

3. RStudio Active Coding Area Some Point-and-Click
Place to Enter Single Commands
View Some Output

4. Computing Average in Excel
Range of
Data
Mathematical
Formula

5. How to Find Average in R? STEPS Open a New Script
Write Code to Create a “Vector” (Column of Data)
Run the Code
Review Results

6. Open up a New Script Window

7. How to Create a “Range” in R?
Use the c() function to combine values or text
In R a column is called a Vector
? to get more information ?c

8. How to Get Help on a Function

9. Create the following Vector
(i.e. Column of Data)
x <- c(77, 60, 90)
Why a “x”
Why a “<-”
and not an “=“
can be named most anything
Both work.
“<-” is traditional

10. RStudio Environment 1 2 4 3 Variable shows up in the environment panel
Enter Code 2
Run 4
Or CTRL-Enter
Code is Ran
in the Console 3

11. Let’s Try Some Basic Statistical Functions
mean(x)
max(x)

12. R Built-In Packages

13. R Pre-Loaded Packages

14. Let’s Try Some Graphical Functions
#charts
plot(x)
barplot(x)
pie(x)

15. Plots
Zoom or Export
Page Back
To Clear Console:
CTRL-L

16. Save a Script Current File Directory: getwd()
If Needed, Set New Working Directory
Session > Set Working Directory > Choose Directory
To save script / code:
File > Save As
The File will have a .R filetype