The tidy data set is a comma separated file. Each row has mean of measurements that are mean or standard deviation type of measurements for e.g. tBodyAcc-mean()-X Each column is for a subject with a particular activity for e.g. 1.LAYING is for LAYING activity for subject 1. Each cell of the data represents mean of a measurement for a particular subject and an activity.
For feature information, please refer to "UCI HAR Dataset/features_info.txt".