In this directory, you can find:

1) a script which extracts a signal by linear regression over a range of lags:
regressedts.R

2) a script which extracts a signal by multilinear regression over a set of indices:
multipleregress.R 

3) a script which filters out a signal by a linear regression over a range of lags:
filteroutreg.R 

4) a script which computes Poisson regressions (predictand -> predictor):
PoissonReg.R

5) a script which computes Poisson regressions after accounting for a trend:
PoissonRegwTrend.R 

More information can be found in the documentation here:
http://ic3.cat/wikicfu/index.php/Tools/Regression