Consider a Poisson process , with non-homogeneous intensity . Here, we consider a deterministic function, not a stochastic intensity. Define the cumulated intensity in the sense that the number of events that occurred between time  and  is a random variable that is Poisson distributed with parameter  . For example, consider here a cyclical ... [Read more...]

Yesterday, Christopher asked me how to store an R object, in order to save some time, when working on the project. First, download the csv file for searches related to some keyword, via http://www.google.com/trends/, for instance “sunglasses“. Recall that csv files store tabular data (numbers and ... [Read more...]