The project is composed by two scripts: get_data.R and run_analysis.R
get_data.R contains a function called get.data which creates a directory to store data, download dataset and return a list of data frames obtained from dataset and get.data is called inside run_analysis by getting the data.
run_analysis performs the data analysis on the downloaded dataset following the steps mentioned in assignment description:
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Merges the training and the test sets to create one data set.
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Extracts only the measurements on the mean and standard deviation for each measurement.
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Uses descriptive activity names to name the activities in the data set
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Appropriately labels the data set with descriptive variable names.
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From the data set in step 4, creates a second, independent tidy data set with the average of each variable for each activity and each subject.
And finally stores the resulting tidy dataset in data directory.