_I_n_v_o_k_e _a _T_e_x_t _E_d_i_t_o_r
	
	     edit(name=NULL, file="", editor = "vi")
	     vi(name=NULL, file="")
	     emacs(name=NULL, file="")
	     xemacs(name=NULL, file="")
	     xedit(name=NULL, file="")
	
	_A_r_g_u_m_e_n_t_s:
	
	        name : a named object that you want to edit. If name
	               is missing then the file specified by file is
	               opened for editing.
	
	        file : a string naming the file to write the edited
	               version to.
	
	      editor : a string naming the text editor you want to
	               use.
	
	_D_e_s_c_r_i_p_t_i_o_n:
	
	     edit invokes the text editor specified by editor with
	     the object name to be edited. data.entry can be used to
	     edit data.  It is important to realize that edit does
	     not change the object called name.  Instead, a copy of
	     name is made and it is that copy which is changed.
	     Should you want the changes to apply to the object name
	     you must assign the result of edit to name.
	
	     In the form edit(name), edit deparses name into a tem-
	     porary file and invokes the editor editor on this file.
	     Quiting from the editor causes file to be parsed and
	     that value returned.  Should an error occur in parsing,
	     possibly due to incorrect syntax, no value is returned.
	     Calling edit(), with no arguments, will result in the
	     temporary file being reopened for further editing.
	
	_S_e_e _A_l_s_o:
	
	     data.entry, fix.
	
	_E_x_a_m_p_l_e_s:
	
	     # use xedit on the function mean and assign the changes
	     mean <- edit(mean, editor="xedit")
	
	     # use vi on mean and write the result to file mean.out
	     vi(mean, file="mean.out")