labs weeks 1-3

Question 1

structure how we store EEG data

Answer 1

in raw format stored in an array, with a separate index variable for the time axis

Question 2

where are amplitude, frequency and offset in the sine wave?

Answer 2

Question 3

ERP in terms of the EEG data

Answer 3

the average signal over individual trials for a particular electrode (could be for particular or all participants)

Question 4

how is the data of the EEG stored?

Answer 4

nChan x nTime x nTrial

Question 5

what does this mean?

Answer 5

64 channels (electrodes)

640 samples/timepoints for each channel

99 repetitions (trials) for each recording

Question 6

compute the ERP of each channel in Python

Answer 6

erp = np.nanmean(data, axis = 2)

Question 7

ValueError: x and y must have same first dimension, but have shapes (640,) and (64, 640)

• what to do?

Answer 7

np.transpose(y)

Question 8

how to make this plot?

Answer 8

Question 9

how to display legend like this?

Answer 9

ax.legend(channames, ncol = 6, bbox_to_anchor=(1,1), loc=”upper left”)