# Log file structure

LinMaze sessions are logged into an HDF5 file with a .vrl extension.

The file has the following structure:

time
  time axis, array of float values of the computer’s time in seconds
g_time
  time axis, array of integer values of the gramophone’s time in tenths of a millisecond
paused
  array of zeros and ones, value is 1 if the simulation was paused at that point
input_1
  the satte of the digital input 1, 1 is high 0 is low
input_2
  the satte of the digital input 2, 1 is high 0 is low
output_1
  the satte of the digital output 1, 1 is high 0 is low
output_2
  the satte of the digital output 2, 1 is high 0 is low
output_3
  the satte of the digital output 3, 1 is high 0 is low
output_4
  the satte of the digital output 4, 1 is high 0 is low
position
  the position in the maze in pixels
teleport
  array of zeros and ones, 1 if there was a teleport at that point
velocity
  array of signed integers with the velocity in pixels/record
zone
  n×m matrix of ones and zeros. Each column is an array of ones and zeros for that zone
zone_types

  a group of arrays of zeros and ones for each zone type that was defined

  zone_types/example
    1 when the mouse was in an ‘example’ zone, 0 otherwise

# Metadata

The metadata of each session is saved in the attributes of the root of the file.

level_name
  The name name of the Level this simulation used
RGB
  A three element array with the ratio of Red, Green and Blue pixel values
zone_offset
  The zone offset used for this simulation ie. the virtual position of the mice on the screen
velocity_ration
  The velocity ratio used for this simulation ie. how many pixels the screen was moved for each full rotation of the wheel
transition_width
  The width of the smooth transition between each Frame of the simulation
start_time
  The time the simulation started as a UNIX timestamp
start_time_hr
  The time the simulation started in a human readable format
start_time
  The time the simulation ended as a UNIX timestamp
start_time_hr
  The time the simulation ended in a human readable format
software_version
  What version of GramophoneTools was used to make this log
screen_width
  The set width of the screen
screen_height
  The set height of the screen
runtime_limit
  The runtime limit of the simulation in minutes (or None if it was not set)
left_monitor
  The number of the monitor on the left side of the animal (or None if it was not used)
right_monitor
  The number of the monitor on the right side of the animal (or None if it was not used)
device_serial
  The serial number of the device that was used for this simulation