itsCumdif                package:its                R Documentation

_C_u_m_u_l_a_t_i_o_n, _D_i_f_f_e_r_e_n_c_i_n_g _f_o_r _I_r_r_e_g_u_l_a_r _T_i_m_e-_S_e_r_i_e_s _O_b_j_e_c_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     Cumulation, differencing for objects of class '"its"'.

_D_e_t_a_i_l_s:

     'cumsum' and 'diff' perform the cumulative sum and difference of
     each column in turn.  In 'diff', the first 'lag' rows are
     discarded.

_V_a_l_u_e:

     An object of class '"its"'

_U_s_a_g_e:

     cumsum(x) diff(x,lag=1)

_A_r_g_u_m_e_n_t_s:

     _x an object of class '"its"'

     _l_a_g an integer number of lags

_A_u_t_h_o_r(_s):

     Giles Heywood

_S_e_e _A_l_s_o:

     'ts', 'POSIXct', 'itsFile', 'itsLags' 'itsJoin' 'itsTimes'
     'itsSubset' 'itsFin' 'itsDisp' 'itsInfo' 'itsCumdif' 'itsArith'

_E_x_a_m_p_l_e_s:

     b <- newIts(1:60,ncol=3)
     cumsum(b)
     diff(b,lag=2)

