Getting_and_cleaning_data_course_project

获取和清理数据课程项目 介绍：项目数据： : #Description：您应该创建一个名为 run_analysis.R 的 R 脚本，它执行以下操作。 Merges the training and the test sets to create one data set. Extracts only the measurements on the mean and standard deviation for each measurement. Uses descriptive activity names to name the activities in the data set Appropriately labels the data set with descriptive variable names. From the data set in step 4,