Exercises by data set

• Cod
• Crohns
• indianMothers
• NetPackets

The Cod Stomachs Data Set

• Designing a database

The Crohn's Diseases Data Set

• Reading the data into R
• Extracting individual IDs
• Extracting individual alleles
• Replacing zeroes with question marks
• Pasting rows together
• Combining lines of output
• Writing the new file

The Indian Mothers Data Set

• The original storage format
• The storage format provided
• Reading the data into R
• Reshaping the data
• Recoding the gender variable
• Tables of counts

The Network Packets Data Set

• Reading the data into R
• Displaying significant digits
• Numerical precision