  Analytic models of two computer generated time series (Logistic map and
Rossler system) and two real time series (ion saturation current in Aditya
Tokamak plasma and NASDAQ composite index) are constructed using Genetic
Programming (GP) framework. In each case, the optimal map that results from
fitting part of the data set also provides a very good description of rest of
the data. Predictions made using the map iteratively range from being very good
to fair.
