Read in sensor data and make it all pretty and tidy

Required libraries

• reshape2

Read in data files

• Activity lables
• Features file
• Training files ** x_train ** y_train ** subject_train
• Test files ** x_test ** y_test ** subject_test

Fixing up our data

• Apply column names from feature list files
• Combine train and test X data
• Combine train and test Y data
• Combine subject ID data
• Create a map of activity number to activity name
• Merge activity name to sensor data by activity ID
• Add subject ID numbers to our sensor data

Manipulate the data

• Convert the full data into a table for easier manipulation later
• Get only the column names that end itn std() or mean()
• Melt our full data set that has these features ** Only the coulmns we selected above ** Is tall and skinny with columns for subject ID, acitivity name, measurement name and value of measurement ** Has clear column names

Write the data

• Write out a delimited txt file