Basic R utilities used in many packages and functions, such as date and string manipulations, statistical distributions, geometry of lines and distances. The R package date is required for the two data functions.
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Function Description: asymp.htThe function from Sean Thomas which produces an asymptote for y as a function of x. Original version: y=ymax*(1-exp(-a*x^b)) This is the centered version, with x normalized by dividing by parameter k, which is the x value at which y is half ymax. This eliminates correlation between the a and b parameters in the above version, but not the correlation between parameters 1 and 2.