g.intensitygradient {GGIR} | R Documentation |
Calculates the intensity gradient based on Rowlands et al. 2018. The function assumes that the user has already calculated the value distribution.
g.intensitygradient(x,y)
x |
Numeric vector of mid-points of the bins (mg) |
y |
Numeric vector of time spent in bins (minutes) |
y_intercept |
y-intercept of a linear regression line in log-log space |
gradient |
Beta coefficient of a linear regression line in log-log space |
rsquared |
R squared of x and y values in log-log space |
Vincent T van Hees <v.vanhees@accelting.com>
Rowlands A, Edwardson CL, et al. (2018) Beyond Cut Points: Accelerometer Metrics that Capture the Physical Activity Profile. MSSE 50(6):1. doi:10.1249/MSS.0000000000001561