This code is written to calculate PDFs and statistical properties of the chosen variables (vorticity, surface wind speed, and vertically integrated anomalous temperature) according to : Camargo, S. J., & Zebiak, S. E. (2002). Improving the Detection and Tracking of Tropical Cyclones in Atmospheric General Circulation Models. Weather and Forecasting, 17(6), 1152–1162. https://doi.org/10.1175/1520-0434(2002)017<1152:ITDATO>2.0.CO;2 Written by :Ahmed Homoudi September 2020