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List entities in a file:

How to list all entities in a file called maoli01.mcd:

import neuroshare as ns
fd = ns.File('maoli01.mcd')
for idx, entity in enumerate(fd.entities):
    print('%04d: "%s" [type: %d]' % (idx, entity.label, entity.entity_type))

This will produces the following output:

0000: "trig0001 0000 0000 trig0001" [type: 1]
0001: "elec0001 0000 0000       01" [type: 2]
0002: "elec0001 0001 0001       02" [type: 2]
0003: "elec0001 0002 0002       03" [type: 2]
[...]

Access the raw data inside an analog signal entity:

analog1 = fd.entities[1]  #access the entity 1
data = analog1.get_data() #get all the raw data

The data value is a tuple which contains the raw data and the timestamps for each datapoint. It is also possible to retrieve a subset of the available data:

data = analog1.get_data(100, 10) #fetch 10 elements starting at index 100
print("%d" % data[0].shape)
# -> 10
print (data[0])
# ->
# [  8.50000000e-05   7.00000000e-05   2.16666667e-05   3.16666667e-05
#   3.66666667e-05   0.00000000e+00  -5.50000000e-05  -9.33333333e-05
#  -6.66666667e-05   3.33333333e-06]

Metadata

Metadata is exposed as properties of the individual entities:

print(analog1.units)
# -> 'V'
print(analog1.sample_rate)
# -> 25000.0