Change name of the analysis functions.

[JavierDiezSierra]

Some of the functions defined in section 3.1.3 (Analysis) should be replaced in the manuscript and in the code:

• figure_correlation_fig() -> correlation_fig()
• figure_disaggregation_fig -> disaggregation_fig()

[navass11]

The names of the functions have already been changed. @manueldeljesus , it remains to be changed in the paper.