Combine local trig. coeff's into wavelet coeff's
wcoefs = CombineCoeff(rtrigcoefs,itrigcoefs,Window,n)
trigonometric coefficients corresponding to projection of real part of \hat f
trigonometric coefficients corresponding to projection of imag part of \hat f
string selecting window for projection. 'm' -> mother, 'f' -> father, 't' -> truncated mother
length of original signal f
wavelet coefficients for a given level