complete.cases             package:stats             R Documentation

_F_i_n_d _C_o_m_p_l_e_t_e _C_a_s_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     Return a logical vector indicating which cases are complete, i.e.,
     have no missing values.

_U_s_a_g_e:

     complete.cases(...)

_A_r_g_u_m_e_n_t_s:

     ...: a sequence of vectors, matrices and data frames.

_V_a_l_u_e:

     A logical vector specifying which observations/rows have no
     missing values across the entire sequence.

_S_e_e _A_l_s_o:

     'is.na', 'na.omit', 'na.fail'.

_E_x_a_m_p_l_e_s:

     x <- airquality[, -1] # x is a regression design matrix
     y <- airquality[,  1] # y is the corresponding response

     stopifnot(complete.cases(y) != is.na(y))
     ok <- complete.cases(x,y)
     sum(!ok) # how many are not "ok" ?
     x <- x[ok,]
     y <- y[ok]