Objective function for fitting
     
    
    Usage
    objective(coef, t, floor, rainfall)
 
    
    Arguments
- coef
- Fourier coefficients 
- t
- Vector of days (between 1 and 365) 
- floor
- Lower bound on rainfall fit 
- rainfall
- Vector of rainfall 
 
    
    Value
    Sum of squared differences between profile and rainfall data