psuedo.extrema

'''
@Description:   Finding Local Maxima and Local Minima using variable window size for given (x,y) coordinates of waveform
@Author:        Albert Mundu, Anant Goel, Bhumil Sarvaiya 
'''

1. Take window size N
2. Find the local Maxima(lmax) & Minima(lmin) in the window N
3. Compare middle value M of the window N with the lmax & lmin
    a. If M equals lmax and M.x equals lmax.x
        i.  store M in listMax
        ii. update lmax=M
    b. Else if M equals lmin and M.x equals lmin.x
        i.  store M in listMin
        ii. update lmin=M
    c. Else 
        i. Shift the window
4. Check whether lmax or lmin is out of window N due to shifting
    a. If True in case lmax; 
       i.  Find lmax for the window N
       ii. If lmin  greater than equal to newly added value V.
           update lmin=V          
    b. Else If True in case lmin; 
       i.  Find lmin for the window N
       ii. If lmax is less than equal to the newly added value V
           update lmax=V
    c. Else compare lmax & lmin with the newly added value in the window N after shifting by 1
        i.  If lmax less than equal to the newly added value V
            update lmax=V
        ii. Else if lmin greater than equal to the newly added value V
            update lmin=V
5. Repeat Step 3