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→代码
=代码=
=代码=
python:
def tpm_ei(tpm, log_base = 2):
# marginal distribution of y given x ~ Unifrom Dist
puy = tpm.sum(axis=0)
n = tpm.shape[0]
# replace 0 to a small positive number to avoid log error
eps = 1E-10
tpm_e = np.where(tpm==0, eps, tpm)
puy_e = np.where(tpm==0, eps, puy)
# calculate EI of specific x
ei_x = (np.log2(n * tpm_e / puy_e) / np.log2(log_base) * tpm).sum(axis=1)
# calculate total EI
ei_all = ei_x.mean()
return ei_all
=参考文献=
=参考文献=