Change working directory in run_analysis.R Working director need following files: •train – contains training data ( subject_train.txt, X_train.txt, y_train.txt, Inertial Signals ) •test – contains test data ( subject_test.txt, X_test.txt, y_test.txt, Inertial Signals ) •activities_labels.txt - Contains labels for various activities •features.txt - contains information on various features measured.