Acceleration data csv


The raw acceleration data can be exported as a csv file. The following options are provided:

  • file format
    • csv file (plain text) – plain text export (see below). Can be easily imported into third party tools, however generates large file sizes.
    • npy file (binary) – binary file format which generates smaller file size NPY file format
  • compression
    • compressed – The activPAL uses compression when only very small changes in acceleration are detected. To uncompress the data, use the ‘uncompressed sample index’ to indicate when the data is compresssed, and repeat the previous acceleration xyz values for the number of samples indicated.
    • uncompressed – the data is uncompressed as above for convenience, however the uncompressed file size is larger
  • data format
    • g format – converted to acceleration g value
    • integer format – raw 8bit or 10bit number
  • calibration
    • uncalibrated – uncalibrated acceleration data
    • calibrated – calibrated acceleration data (note: unavailable in VANE and CREA algorithms)

csv file format

Column headingDescription
TimeDate and time encoded as a floating point number, The integer part of number represents the date. The decimal portion represents the time.
(Full details at:

To view the time in Excel, follow this these instructions
Uncompressed sample indexSample number in the data
Xx axis value
Yy axis value
Zz axis value

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