nn_tuning.statistics_helper
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import numpy as np # import statsmodels.stats.weightstats as smws def llincc(x, y): """ Calculates Lin's concordance correlation coefficient. Usage: llincc(x,y) where x, y are equal-length arrays Args: x: A numpy array y: A second numpy array to compare against Returns: Lin's CC """ covar = (np.cov(x, y)*(len(x)-1)/float(len(x)))[0, 1] # correct denominator to n xvar = np.var(x)*(len(x)-1)/float(len(x)) # correct denominator to n yvar = np.var(y)*(len(y)-1)/float(len(y)) # correct denominator to n lincc = (2 * covar) / ((xvar+yvar) + ((np.mean(x)-np.mean(y))**2)) return lincc # def tost(a, b, dx=-0.5, dy=0.5): # """ # Runs a Two One Sided T-test to test for similarity # # Args: # a: Input array 1 # b: Input array 2 # dx: delta x # dy: delta y # # Returns: # The resulting tost value # """ # return smws.ttost_ind(a, b, dx, dy)[0]
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def llincc(x, y): """ Calculates Lin's concordance correlation coefficient. Usage: llincc(x,y) where x, y are equal-length arrays Args: x: A numpy array y: A second numpy array to compare against Returns: Lin's CC """ covar = (np.cov(x, y)*(len(x)-1)/float(len(x)))[0, 1] # correct denominator to n xvar = np.var(x)*(len(x)-1)/float(len(x)) # correct denominator to n yvar = np.var(y)*(len(y)-1)/float(len(y)) # correct denominator to n lincc = (2 * covar) / ((xvar+yvar) + ((np.mean(x)-np.mean(y))**2)) return lincc
Calculates Lin's concordance correlation coefficient.
Usage: llincc(x,y) where x, y are equal-length arrays
Args
- x: A numpy array
- y: A second numpy array to compare against
Returns
Lin's CC