Raw triaxial acceleration data of actigraphic measurements – supporting information of “Detailed analysis and comparison of different activity metrics”

This measurement data is a part of the supporting information for our article entitled “Detailed analysis and comparison of different activity metrics”, which is accessible through the references. Besides further details of the measurements and results of our analysis presented in the paper, our work also serves as a general guide on how to proceed if one wants to determine activity from the raw acceleration data (e.g., from this measurement data).
This data package contains 42 raw triaxial acceleration signals of 42 subjects measured during a 10-day observation period, each. The acceleration signals were evenly sampled with 10 Hz in the ±8 g measurement interval and were measured on different healthy and anonymized human subjects’ non-dominant wrists. The participants were instructed to minimize non-wear time, e.g., taking the device off for bathing to avoid water damage. The ethics statement can be found in our referred article.
The downloadable zip file consists of 42 binary files. Each binary file holds the data of a triaxial acceleration signal and general information, which is summarized in the following list.
● The time difference between two consecutive datapoints.
● The absolute starting time of the measurement in numerical LabVIEW timestamp format (time-zone-independent number of seconds that have elapsed since 12:00 a.m., Friday, January 1, 1904, Universal Time).
● The number of datapoints per axis.
● The x, y (vertical when the hand hung), and z-axis acceleration data.
We have attached a MATLAB function to read the binary files with ease, its documentation can be found in the source file.

本测量数据为我们题为《不同活动度量指标的详细分析与对比》的论文的配套支撑信息之一，可通过参考文献获取该论文。除论文中呈现的测量细节与分析结果外，本工作还可为研究者从原始加速度数据（例如本数据集提供的原始加速度数据）中开展活动识别提供通用指导方案。

本数据包包含42名受试者的三轴原始加速度信号，每名受试者均在为期10天的观测期内接受了测量。加速度信号以10 Hz的采样率在±8 g的测量量程内均匀采样，设备佩戴于42名健康且信息已匿名化的人类受试者的非惯用手手腕。参与者被要求尽量减少设备非佩戴时长，例如为避免设备进水损坏，在沐浴时取下设备。相关伦理声明可参阅我们引用的论文。

可下载的压缩包包含42个二进制文件，每个二进制文件存储一条三轴加速度信号数据与相关通用信息，具体信息汇总如下：
● 相邻两个数据点之间的时间间隔
● 测量的绝对起始时间，采用LabVIEW时间戳数值格式（即自世界标准时间1904年1月1日周五00:00起流逝的秒数，与时区无关）
● 每个轴上的数据点数量
● x、y（手部自然下垂时为垂直方向）、z轴的加速度数据

我们附带了一个MATLAB函数以简化二进制文件的读取操作，该函数的说明文档可在源文件中查阅。