SeparateStreams¶
Separate streams that match a criterion from other streams.
An incoming data packet may carry multiple data streams, and for each stream a packet will have one chunk. This node will check the properties (props) of each chunk whether they meet the specified condition, and if so, the chunk will appear in the 'matching' output, otherwise in the 'other' output. To negate a condition, one may simply use the output of the 'other' output instead of the 'matching' output, but one can also prefix the condition with a 'not' keyword, as in: 'not is_signal'. The condition is generally an expression that is evaluated in the context of the properties (props) of the stream, where missing properties are assumed to be None. So for example, the following are also valid: "is_signal and unit=='uV'"; "int(subject_id) <= 100". The node Merge Streams can be used to recombine previously separated streams again into a single packet (but not that the order of the streams may not be preserved). Version 0.5.0
Ports/Properties¶
data¶
Data to process.
matching¶
Data with only matching streams.
other¶
Remaining data that did not match the criterion.
condition¶
The condition that matching streams need to satisfy. This is generally an expression that is evaluated on the properties (props) of the stream. See documentation on NeuroPype's sandboxed Python expression grammar for more information.
set_breakpoint¶
Set a breakpoint on this node. If this is enabled, your debugger (if one is attached) will trigger a breakpoint.
metadata¶
User-definable meta-data associated with the node. Usually reserved for technical purposes.