object.size               package:base               R Documentation

_R_e_p_o_r_t _t_h_e _S_p_a_c_e _A_l_l_o_c_a_t_e_d _f_o_r _a_n _O_b_j_e_c_t

_D_e_s_c_r_i_p_t_i_o_n:

     Provides an estimate of the memory that is being used to store an
     R object.

_U_s_a_g_e:

     object.size(x)

_A_r_g_u_m_e_n_t_s:

       x: An R object.

_D_e_t_a_i_l_s:

     Exactly which parts of the memory allocation should be attributed
     to which object is not clear-cut.  This function merely provides a
     rough indication.  For example, it will not detect if character
     storage for character strings are shared between identical
     elements (which it will be if `rep' was used, for example).

     The calculation is of the size of the object, and excludes the
     space needed to store its name in the symbol table.

     Two or more objects can be `.Alias'es of each other. `object.size'
     will return the same information, that for the actual object, for
     each of them.

_V_a_l_u_e:

     An estimate of the memory allocation attributable to the object,
     in bytes.

_E_x_a_m_p_l_e_s:

     object.size(letters)
     object.size(ls)
     ## find the 10 largest objects in base
     z <- sapply(ls("package:base"), function(x) object.size(get(x)))
     as.matrix(rev(sort(z))[1:10])

