Add temporal alignment functionality of two signals about sam HOT 2 CLOSED

I think it is a good idea. There is generally not a lot of functionality in the exploration module, as it did not have priority.

It might become a challenge to create consistency in this module though...

Please check the existing functions to avoid any overlap etc. Also I once created this function for another project, although it is not the most difficult function :D

def find_delay(datax, datay, lag_range, absolute=False):
"""Find the delay between two time series.

Parameters
----------
datax : pd.Series
    Time series x
datay : pd.Series
    Time series y
lag_range : list
    Range of lags to search for delay
absolute : bool (default False)
    If True, return the absolute value of correlation to find the delay

Returns
-------
delay : int
    Delay between x and y
corr : float
    Strongest correlation between x and y
"""
corr = [datax.shift(x).corr(datay) for x in lag_range]
if absolute:
    corr = [abs(x) for x in corr]
return lag_range[np.argmax(corr)], corr[np.argmax(corr)]

from sam.

We are not sure if we want to incorporate this into SAM at this point. Once we find another use case we might. For now, not merging and putting on hold!

from sam.