dimnames                package:base                R Documentation

_D_i_m_n_a_m_e_s _o_f _a_n _O_b_j_e_c_t

_D_e_s_c_r_i_p_t_i_o_n:

     Retrieve or set the dimnames of an object.

_U_s_a_g_e:

     dimnames(x)
     dimnames(x) <- nlist

_A_r_g_u_m_e_n_t_s:

       x: an R object, for example a matrix, array or data frame.

   nlist: a list of the length `dim(x)' whose components are either
          null or character vectors the length of the appropriate
          dimension of `x'.

_D_e_t_a_i_l_s:

     The functions `dimnames' and `dimnames<-' are generic.

     For an `array' (and hence in particular, for a `matrix'), they
     retrieve or set the `dimnames' attribute (see attributes) of the
     object. The list `nlist' can have names, and these will be used to
     label the dimensions of the array where appropriate.

     Both have methods for data frames.  The dimnames of a data frame
     are its `row.names' attribute and its `names'.

_S_e_e _A_l_s_o:

     `rownames', `colnames'; `array', `matrix', `data.frame'.

_E_x_a_m_p_l_e_s:

     ## simple versions of rownames and colnames
     ## could be defined as follows
     rownames0 <- function(x) dimnames(x)[[1]]
     colnames0 <- function(x) dimnames(x)[[2]]

