When you're exploring your data to make sure you meet your assumptions, or to…find interesting exceptions, graphics are an excellent first step.…However, most analyses also require the precision of numbers in addition to the…heuristic value of graphics.…Just as we started with graphics for categorical variables, we'll also start…with statistics for categorical variables.…The most common statistics in this case are frequencies, which is what we'll do first.…I am going to use the data set that I have been using so far; social network.…I'm going to come down here, and…because I have it saved in my default location, which I set to be the Desktop, I…can simply run this line to read the CSV file.…
I see in the console that that command ran fine.…In the top right in the Workspace, I see that I've now loaded the date set sn,…for social network; it's got 202 observations in 5 variables.…The next thing is to create the default table, and this is a frequency table.…It does it in alphabetical order, and it looks like this when I run it.…
Author
Released
4/4/2013The course continues with examples on how to create charts and plots, check statistical assumptions and the reliability of your data, look for data outliers, and use other data analysis tools. Finally, learn how to get charts and tables out of R and share your results with presentations and web pages.
- What is R?
- Installing R
- Creating bar character for categorical variables
- Building histograms
- Calculating frequencies and descriptives
- Computing new variables
- Creating scatterplots
- Comparing means
Skill Level Beginner
Duration
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Introduction
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Welcome47s
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1. What is R?
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R in context3m 35s
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2. Getting Started
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Using RStudio4m 41s
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Reading data from a spreadsheet11m 17s
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Reading data from SPSS6m 14s
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3. Charts and Statistics for One Variable
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Calculating frequencies4m 24s
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Calculating descriptives7m 3s
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4. Modifying Data
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Recoding variables9m 56s
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Computing new variables4m 25s
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5. Charts for Associations
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Creating scatterplots4m 16s
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Creating 3D scatterplots2m 15s
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6. Statistics for Associations
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Calculating correlations6m 29s
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Computing a regression6m 33s
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Conclusion
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Next steps4m 11s
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Video: Calculating frequencies