M01_IntroToR.pptx - Introduction to R Stephen Penn...

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Introduction to R Stephen Penn Harrisburg University September 19, 2015
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Installing R Go to www.r-project.org Follow the link to CRAN Select a mirror site Download for your OS Each OS has distinct instructions…
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Interfaces for R Command Line – the default RStudio – available at www.rstudio.org , get the free version Rcommander – available at www.rcmdr.com , has drop down menus Rattle – strictly data mining
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Math at the Command Line Basic operators - +, -, *, /, ^ Functions – date(), mean(), round(), help() Assignment Operator - Data Frames – hold data sets (tables) Each column is a vector (same data type) Each row is an observation
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Loading Data into R Dataset1 read.csv(“C:/mystatsdata/mysurvey.csv”) If your data is an Excel file, you can save it as a CSV then load it into R. Just make sure there are no merged cells or blank rows, are anything other than a simple table Or, you can key data in directly using the combine function c(), such as… Mydata <- c(0,1,2,3,4,5,6,7,8,9)
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