(x= air ,center= air.center ,cov= air.cov)# Cutoff value for ditances from Chi-Sqaure Dist.# with p = 0.95 df = 2 which in ncol(air)cutoff <- qchisq(p= 0.95 ,df= ncol(air))## Display observation whose distance greater than cutoff valueair[distances > cutoff ,]## Returns : ...
The probability distributions of the projection distances and the statistical cutoff values for leverage point identification have been determined through Monte Carlo simulations and Q-Q plots. It is found that the projection distances follow {dollar}chisp2{dollar}-distributions with degrees of freedom ...
One way to detect outlier is the “Mahalanobis distance”. And we are going to calculate the Mahalanobis distance to the center of the population. Previously we have calculated with the NIPALS algorithm the T score matrix, for three PCs. Let´s calculate now the Mahalanobis distance (Library...
# 需要导入模块: from sklearn.covariance import EmpiricalCovariance [as 别名]# 或者: from sklearn.covariance.EmpiricalCovariance importmahalanobis[as 别名]classMahalanobis(BaseEstimator):"""Mahalanobis distance estimator. Uses Covariance estimate to computemahalanobisdistance of the observations from the model...
Figure 2. Simulation of Mahalanobis distance (MD) using the vibration acceleration data. The waveforms of the vibration as shown in (b) can be obtained by operating (a) the lifter. Then, by using (c) the generated unit space for normal data, finally (d) the MD can be obtained. Table...