Recording backend memory - Store data in main memory¶
When a recording device sends data to the
memory backend, it is
stored internally in efficient vectors. These vectors are made
available to the user level in the device’s status dictionary under
events dictionary always contains the global IDs of the source
nodes of the recorded data in the field
sender. It also always
contains the time of the recording. Depending on the setting of the
time_in_steps, this time can be stored in two different
time_in_stepsis false (which is the default), the time is stored as a single floating point number in the field
times, interpreted as the simulation time in ms
time_in_stepsis true, the time is stored as a pair consisting of the integer number of simulation time steps in units of the simulation resolution in
timesand the negative offset from the next such grid point as a floating point number in ms in
All additional data collected or sampled by the recording device is
contained in the
events dictionary in arrays. These data are named
based on the recordable they came from and with the appropriate data
type (either integer or floating point).
The number of events that were collected by the
memory backend can
be read out of the n_events entry in the status dictionary of the
recording device. To delete data from memory, n_events can be set to
0. Other values cannot be set.
A dictionary containing the recorded data in the form of one numeric array for each quantity measured. It always has the sender global IDs of recorded events under the key
sendersand the time of the recording, the format of which depends on the setting of
The number of events collected or sampled since the last reset of n_events. By setting n_events to 0, all events recorded so far will be discarded from memory.
A Boolean (default: false) specifying whether to store time in steps, i.e., in integer multiples of the simulation resolution (under the key
eventsdictionary) plus a floating point number for the negative offset from the next grid point in ms (under key
offset), or just the simulation time in ms under key
times. This property cannot be set after Simulate has been called.