1. Application areas

There are many areas of application, some of which are outlined below. Readers will be able to draw further examples from their own experience:

• finance and econometrics: we can track the evolution of :

  • stock market indices,

  • prices,

  • economic data,

  • sales and purchases of goods,

  • agricultural or industrial production;

• medicine and biology :

  • evolution of pathologies,

  • records of examinations such as electroencephalograms (eeg) and electrocardiograms (ecg);

• earth and space sciences :

  • tide...