Brachycera              package:BSagri              R Documentation

_E_k_l_e_k_t_o_r _c_o_u_n_t_s _o_f _B_r_a_c_h_y_c_e_r_a

_D_e_s_c_r_i_p_t_i_o_n:

     In a field trial, 4 treatments were arranged in a randomized
     complete block design with 8 blocks and 32 plots. Soil eklektor
     traps were placed in each plot, on six dates from 2005-07-12 to
     2005-09-25, the number of individuals of Brachycera (Flies, Order
     Diptera) hatching from soil were counted. The individuals were
     classified to the family level. Interest was in assessing
     potential effects of the novel treatment (Novum) on the abundance
     of Brachycera, compared to a  near standard (Standard) and two
     additional standard treatments, A and B.

_U_s_a_g_e:

     data(Brachycera)

_F_o_r_m_a_t:

     A data frame with 192 observations on the following 15 variables.

     '_D_a_t_e' a POSIXt variable, the time of counting the individuals in
          the eklektor trap

     '_T_r_e_a_t_m_e_n_t' a factor with 4 levels 'A' 'B' 'Standard' 'Novum',
          where 'Novum' is the novel treatment of interest in safety
          assessment, and 'Standard' is the nearest standard treatment
          which commonly accepted. 'A' and 'B' are two additional
          standard treatments.

     '_B_l_o_c_k' a numeric vector, specifying the eight blocks 1-8

     '_P_l_o_t' a factor with levels 'A1' 'A2' to 'Standard8', indicator of
          the individuals plots

     '_A_g_r_o_m_y' a numeric vector, counts of individuals

     '_A_n_t_h_o_m' a numeric vector, counts of individuals

     '_C_a_l_l_i_p' a numeric vector, counts of individuals

     '_C_h_l_o_r_o' a numeric vector, counts of individuals

     '_E_p_h_y_d' a numeric vector, counts of individuals

     '_D_r_o_s_o' a numeric vector, counts of individuals

     '_H_y_b_o' a numeric vector, counts of individuals

     '_M_u_s_c_i' a numeric vector, counts of individuals

     '_P_h_o_r_i' a numeric vector, counts of individuals

     '_S_p_h_a_e_r' a numeric vector, counts of individuals

     '_T_o_t_a_l' a numeric vector, counts of individuals

_S_o_u_r_c_e:

     ...

_E_x_a_m_p_l_e_s:

     data(Brachycera)

     par(mar=c(11,5,3,1))

     boxplot(Total ~ Treatment*Date, data=Brachycera, las=2, 
     col=c("white","white","blue","green"))

     legend(x=15, y=80, legend=levels(Brachycera$Treatment),
      fill=c("white","white","blue","green"))

