The first thing to do is to select appropriate relevant data that carries most of the system's dynamics that we want the neural network to reproduce. In our case, we need to select data that is relevant for weather forecasting.
Tip
While selecting data, getting an expert opinion about the process and its variables can be really helpful. The expert does help a lot in understanding the relationship between the variables, thus selecting them in an appropriate fashion.
In this chapter, we are going to use the data from the Brazilian Institute of Meteorology (INMET - http://www.inmet.gov.br/ in Portuguese), which is freely available on the Internet and we have the rights to apply it in this book. However, the reader may use any free weather database from the Internet while developing applications. Some examples from the English language sources are listed as follows:
Wunderground (http://wunderground.com/)
Open weather map (http://openweathermap.org/api)
Yahoo...