s.qcount(1)		      Grass User's Manual		   s.qcount(1)



NNAAMMEE
       ss..qqccoouunntt  - indices for quadrat counts of sites lists
       _(_G_R_A_S_S _S_i_t_e_s _P_r_o_g_r_a_m_)

SSYYNNOOPPSSIISS
       ss..qqccoouunntt
       ss..qqccoouunntt hheellpp
       ss..qqccoouunntt [--cciiqq] ssiitteess==_n_a_m_e nn==_v_a_l_u_e rr==_v_a_l_u_e

DDEESSCCRRIIPPTTIIOONN
       _s_._q_c_o_u_n_t  chooses  nn  circular  quadrats of radius rr such that they are
       completely within the bounds of the current region and no two  quadrats
       overlap.   The  number of sites falling within each quadrat are counted
       and indices are calculated to estimate the departure of site  locations
       from complete spatial randomness.

OOPPTTIIOONNSS
   FFllaaggss::
       --cc     Print  count  data  for each quadrat in the form of a sites list
	      (E|N|#n %count, where E is the easting and N is the northing  of
	      the  quadrat  center,  n is the quadrat number, and count is the
	      number of sites contained within the quadrat).

       --ii     Suppress printing table of indices (default is to print  indices
	      and not the count data).

       --qq     Quiet. Cut out the chatter.


   PPaarraammeetteerrss::
       ssiitteess==_n_a_m_e
	      Name of sites list defining qcount points.

       nn==_v_a_l_u_e
	      Number of quadrats (integer).

       rr==_v_a_l_u_e
	      Radius of quadrats (floating point).


NNOOTTEESS
       This  program may not work properly with lat-long data. It uses _h_y_p_o_t_(_)
       in two files: _c_o_u_n_t_._c and _f_i_n_d_q_u_a_d_s_._c.

SSEEEE AALLSSOO
       _s_._r_a_n_d_o_m


       _C_o_m_p_l_e_t_e _S_p_a_t_i_a_l _R_a_n_d_o_m_n_e_s_s _a_n_d _Q_u_a_d_r_a_t _M_e_t_h_o_d_s	-  GRASS  Tutorial  on
       _s_._q_c_o_u_n_t (available as s.qcount-tutorial.ps),


       General references include:
       Noel  A.  C.  Cressie.	_S_t_a_t_i_s_t_i_c_s  _f_o_r _S_p_a_t_i_a_l _D_a_t_a.  Wiley Series in
       Probability and Mathematical Statistics. John Wiley & Sons,  New  York,
       NY, 1st edition, 1991.
       Brian  D. Ripley.  _S_p_a_t_i_a_l _S_t_a_t_i_s_t_i_c_s.  John Wiley  Sons, New York, NY,
       1981.


       References to the indices include:
       F. N. David and P. G. Moore.   Notes  on  contagious  distributions  in
       plant populations.  _A_n_n_a_l_s _o_f _B_o_t_a_n_y, 18:47-53, 1954.
       J.  B.  Douglas.   Clustering  and aggregation.	_S_a_n_k_h_y_a _B, 37:398-417,
       1975.
       R. A. Fisher, H. G. Thornton, and W. A. Mackenzie.  The accuracy of the
       plating	method	of  estimating	the  density of bacterial populations.
       _A_n_n_a_l_s _o_f _A_p_p_l_i_e_d _B_i_o_l_o_g_y, 9:325-359, 1922.
       M. Lloyd.  Mean crowding.  _J_o_u_r_n_a_l _o_f _A_n_i_m_a_l _E_c_o_l_o_g_y, 36:1-30, 1967.
       M. Morista.  Measuring the dispersion and analysis of distribution pat-
       terns.	_M_e_m_o_i_r_e_s  _o_f _t_h_e _F_a_c_u_l_t_y _o_f _S_c_i_e_n_c_e_, _K_y_u_s_h_u _U_n_i_v_e_r_s_i_t_y_, _S_e_r_i_e_s
       _E_.  _B_i_o_l_o_g_y, 2:215-235, 1959.

BBUUGGSS
       Timestamp not working for header part of counts output. (2000-10-28)


       Please send all bug fixes and comments  to  the	author	or  the  grass
       development team.

       http://www.geog.uni-hannover.

AAUUTTHHOORR
       James Darrell McCauley ,

       when he was at: Agricultural Engineering Purdue University


       Modified for GRASS 5.0 by Eric G. Miller (2000-10-28)

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_5 _$



GRASS 5.0							   s.qcount(1)
