ActiGraph ACTITRAINER Uživatelský manuál stáhnout pdf (Strana 87)

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*.agd files are created in ActiLife immediately when data from a GT1M, GT3X, ActiTrainer, or ASM device is downloaded

through the “Devices” tab. These *.agd files typically contain post-filtered and accumulated data as this is the only type

of data that ActiLife can properly handle. The rows in the database represent whole-number epoch summations (1s, 5s,

10s, 30s, 60s, etc.). However, at the time of this writing all GT1M, GT3X, ActiTrainer, and ASM products that have been

initialized to collect raw data (12Hz or 30Hz) will produce an *.agd file on download. Although the file cannot be

processed in ActiLife, the *.agd format can be exported to *.csv or *.dat through ActiLife’s import/export tool or AGD

viewer tool, both accessible from the File menu.

GT3X+ devices produce a *.gt3x file on download (see

*.gt3x File Format). In order to process in ActiLife, the file must

be exported to *.agd format. This can be done at the time of download by checking “Create AGD File” from the

download dialog box or by using ActiLife’s built-in import/export tool available from the File menu.

*.agd Data Table Format

The data table in the *agd database consist of the following parameters. Their calculations are explained.

dataTimeStamp – a measure of total Ticks. A single tick represents one hundred nanoseconds or one ten-millionth of a

second. There are 10,000 ticks in a millisecond. The value of this property represents the number of 100-nanosecond

intervals that have elapsed since 12:00:00 midnight, January 1, 0001. More information available at

http://msdn.microsoft.com/en-us/library/system.datetime.ticks.aspx

axis 1 – Post filtered and accumulated per-epoch vertical activity data

axis 2 (optional) – Post filtered and accumulated per-epoch horizontal activity data

axis 3 (optional) – Post filtered and accumulated per-epoch perpendicular activity data

steps (optional) – Total steps per epoch

hr (optional) – Heart beats-per-epoch. This data is only gathered by ActiTrainer devices when those devices are

initialized to collect heart rate data AND when the Polar® Heart Monitor (wireless heart strap) is worn by the user.

Lux (optional) – Ambient light sampled once per second (on GT3X+ and ASM devices only) and averaged over the length

of the selected epoch. (e.g., for 60s epochs, this would be the light values summed once per second and divided by 60).

Inclinometer (optional) – Device orientation information. This is calculated by sampling the angle of the device over the

entire length of the epoch (30 times per second) and selecting the predominant angle; i.e, the angle “range” that

appeared the majority of the time over the epoch. For details about inclinometer functionality, see the

Inclinometer

Whitepaper.

*.dat File Format

Older versions of ActiLife produced *.dat files when downloading data from devices. These files consist of ten (10) lines

of header data (meta information about the content) followed by epoch accumulated/filtered data. This “DAT” file

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ActiGraph ACTITRAINER Uživatelský manuál Strana 87