Figure 3
From: Heart rate variability analysis using robust period detection
Regression between LF/HF ratios for IBI series with distorted/removed beats and undistorted series. Linear regression log(Y) = p1∙log(X) + p0 was calculated for log transformed LF/HF ratios for IBI series with distorted/removed beats (Y) and undistorted series (X) by the RPD, LSP and FFT methods (distortion rates up to 20%). Top: goodness of fit R2; Middle: coefficient p1; Bottom: intercept p0 (dis: IBI series with distorted series, rem: IBI series with removed beats).