Ning Mei nmningmei

consciousness,metacognition,semantic processing,fMRI,M/EEG,generative models.

nmningmei / white_noise.py

Created April 29, 2019 20:34 — forked from dilawar/white_noise.py

Create white noise stimulus in python using psychopy

	# Generate noise frames
	# dependencies: psychopy, python-numpy, python-pyglet
	from numpy import random
	from psychopy import visual

	# create a window
	win = visual.Window([800, 600], monitor="testMonitor", units="deg")

	maskDuration = 180 # Duration of mask in frames
	visualNoiseSize = 512 # Dimension in pixels of visual noise. Must be a power of 2

nmningmei / pdist_correlation_comparison_same

Last active September 28, 2021 12:54

To show scipy.spatial.distance.pdist produce the same RDM when using 'correlation' regardless of normalization or not.

	import numpy as np
	from matplotlib import pyplot as plt
	from scipy.spatial import distance

	# create data the center at zero, 36 words by 100 voxels
	zero_mean_data = np.random.rand(36,100)
	zero_mean_data = zero_mean_data - zero_mean_data.mean(1).reshape(-1,1) # so each row has mean zero

	# create data that is not center at zero, 36 words by 100 voxels
	sim_data = zero_mean_data.copy()