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CSC 433 -- R Examples

Weekly Zipfiles

r-week5.zip   r-week6.zip   r-week7.zip   r-week8.zip   r-week9.zip

Index of R Examples

• Intro: Matrix  Array  MaxDouble  Attributes  Kids 
• Functions: MySquare  MyConcat  MatrixFromList 
• Scatterplots: Cars1  Cars2  AutoSales1  BodyBrain 
• Charts: Election  AutoSales3  PieCharts  DotCharts  Boxplots  FixedWidthFields   Aggregate
• Quantiles: QuantileDefs1  QuantileDefs2
• Simulations: Iris3 
• S3 Classes: Die   RollToSuccess   Infant  
• S4 Class: KidClass
• Maps: Maps
• RHadoop: Mortality

Intro Examples

• MaxDouble Example -- Use for loops to find the the largest double value that is not represented by Inf.
   
  

  Source Code	Output
  maxdouble.R	Output

  
  
• Matrix Example -- Read data from a file into a matrix:
  
   
  

  Data File	Source Code	Output
  matrix.txt	matrix.R	Output

  
  
• Array Example -- Read data from a file into a three dimensional array:
  
   
  

  Data File	Source Code	Output
  array.txt	array.R	Output

  
  
• Attributes Example -- Show examples of how to access and change the attributes of R objects.
   
  

  Source Code	Output
  attributes.R	Output

  
  
• Kids Example -- Read input data files in three formats:
  
  1. Space Delimited
  2. Comma Delimited
  3. Fixed Width Fields
  
   
  

  Data File	Source Code	Output
  kids1.txt kids2.txt kids3.txt	kids1.R kids2.R kids3.R	Output 1 Output 2 Output 3

  
  

Functions Examples

• MySquare Example -- Collect execution times for a user defined function # slowSquare. Then plot the results.
   
  

  Source Code	Output
  mysquare.R	Output times.pdf

  
  
• MyConcat Example -- Create a function that concatenates two vectors element by element.
   
  

  Source Code	Output
  myconcat.R	Output

  
  
• MatrixFromList Example --Create a heterogenous matrix from a list.
   
  

  Source Code	Output
  matrix-from-list.R	Output

Scatterplot Examples

• Cars1 Example -- Plot the cars dataset with columns speed and dist. Create nine plots, one for each possible value of type.
   
  

  Source Code	Output Graphs
  cars1.R	car-plots.pdf

  
  
• Cars2 Example -- Plot the cars dataset using a log-log scale.
   
  

  Source Code	Output Graphs
  cars2.R	cars2.pdf

  
  
• AutoSales1 Example -- Plot the autodataset using a log-log scale.
   
  

  Data File	Source Code	Output Graphs
  autosales.txt	autosales1.R	autosales1.png

  
  
• AutoSales2 Example -- Plot the cars dataset using a log-log scale.
   
  

  Data File	Source Code	Output Graphs
  autosales.txt	autosales2.R	autosales1.pdf

  
  
• BodyBrain Example -- Clicking on points in scatterplot shows the animal name for # that point. This process is called brushing.
   
  

  Data File	Source Code	Output Graphs
  bodybrain.txt	bodybrain.R	bodybrain.pdf

  
  

Charts Examples

•  Election Example -- Create barplots of the artificial Election data set.
   
  

  Data File	Source Code	Output Graphs
  election.txt	election.R	election.pdf

  
  
• AutoSales3 Example -- Create barplots of the one week sales of automobiles.
   
  

  Source Code	Output Graphs
  autosales3.R	autosales3.pdf

  
  
• PieCharts Example -- Create pie charts for one week sales data of cars.
   
  

  Source Code	Output Graphs
  pie-charts.R	pie-charts.pdf

  
  
• DotCharts Example -- Create dot charts for one week sales data of cars.
   
  

  Source Code	Output Graphs
  dot-charts.R	dot-charts.pdf

  
  
• Boxplots Example -- Create five boxplots under a variety of conditions.
   
  Reference: Institute for Digital Research and Education, UCLA.
   
  

  Source Code	Output Graphs
  boxplots.R	boxplots.pdf

  
  
•  FixedWidthFields Example -- SAS: Read only data needed using column-style input. Then create barchart using sgplot.
  R: Read data using read.fwf. Create dummy variables to read unwanted fields that will be discarded later. Use table function to aggregate data before creating barplots.
   
  

  Data File	Source Code	Output	Graphs
  students.txt	students.sas	SAS Output	students-sas.png
  students-codebook.txt	students.R	R Output	students-r.pdf

  
  
• Aggregate -- Use dummy variables like the previous FixedWidthFields Example. Use aggregate function to find grouped means before creating barplots.
   
  

  Data File	Source Code	Output	Graphs
  students.txt students-codebook.txt	aggregate.R	Output	aggregate.pdf

  
  

Quantiles Examples

• Compute quantiles in R and SAS. R has 9 different quantile types and SAS has 5. Here are the details.
   
  

  Source Code	Output Graphs
  quantiledefs1.R	Output
  quantiledefs1.sas	Output

  
  

Simulations Examples

• Iris3 Example -- Use the linear discriminant supervised learning algorithm for classifying iris flowers by four features: sepal length, sepal width, petal length, and petal width. The input dataframe is a 3-Dimensional array.
  Install the MASS package before running the example.
   
  

  Source Code	Output Graphs
  iris3.R	Output

  
  

Classes Examples

• Die Example -- Create Die objects in the S3 class style that simulate repeated rolls of a single 6-sided die until a 1 (success) is obtained.
   
  

  Source Code	Output Graphs
  die.R	Output die.pdf

  
  
• RollToSuccess Example -- Create Die and Coin objects using inhertance from a base class named RollToSuccess; use the S3 class style.
  Exercise: Add plot methods for the RollToSuccess, Die, and Coin classes.
   
  

  Source Code	Output Graphs
  roll-to-success.R	Output

  
  
• Infant Example -- Create infant objects in the S3 class style.
   
  

  Source Code	Output Graphs
  infant.R	Output infant.pdf

  
  
• KidClass Example -- Create a Kid class in the S4 class style.
   
  

  Source Code	Output Graphs
  kidclass.R	Output

  
  

Maps Example

• Maps Example -- Show some of the basic R capabilities of producing maps. Install these R packages before running the example: maps, mapdata, ggplot2.
   
  

  Source Code
  maps.R

RHadoop Example

• Mortality Example -- RHadoop source code from Adler, R in a Nutshell, pp. 560 to 561.
   
  

  Source Code
  mortality.R