Probability density function and complementary cumulative distribution function for the human reaction time.
memory.pdf(t, theta = 0.2314843, cutoff = 300, c = 0.0006265725)memory.ccdf(t, theta = 0.2314843, cutoff = 300, c = 0.0006265725)
time
exponent of the power law
the cutoff value where the density changes from constant to power law
the constant density when t is less than the cutoff
the density at t
memory.pdf returns the density function at t.
memory.ccdf returns the ccdf (probabilty of greater than t).
memory.ccdf: Complementary cumulative distribution function
default values are measured from a real Twitter data set.