RECURRENCE PLOTS

Hello guys! I'm having problems calculating the K2 invariant. I sampled the X observable from the Rossler system with a = b = 0.2, c = 5.7 and sampling rate 0.2 (as in Marwan 2007), in order to have a time series with length 10,000. But I found 0.060 +-0,06 instead of 0,069 +-0.03, and the plot of K...