_R_a_n_d_o_m _S_a_m_p_l_e_s _a_n_d _P_e_r_m_u_t_a_t_i_o_n_s
	
	     sample(x, size, replace=FALSE)
	
	_D_e_s_c_r_i_p_t_i_o_n:
	
	     sample takes a sample of the specified size from the
	     elements of x using either with or without replacement
	     sampling according to the value of replace.
	
	     By default size is equal to length(x) so that sample(x)
	     generates a random permutation of the elements of x.
	
	     If x has length 1, sampling takes place from 1:x.
	
	_E_x_a_m_p_l_e_s:
	
	     # a random permutation
	     sample(x)
	     # bootstrap sampling
	     sample(x,replace=TRUE)
	     # 100 Bernoulli trials
	     sample(c(0,1), 100)