AAstat                package:seqinr                R Documentation

_T_o _G_e_t _S_o_m_e _P_r_o_t_e_i_n _S_t_a_t_i_s_t_i_c_s

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

     cd It gives simple protein sequence information including the
     number of residues, the percentage of each physico-chemical class
     of amino acid and the theoretical isoelectric point.

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

     AAstat(seq, plot = TRUE)

_A_r_g_u_m_e_n_t_s:

     seq: a protein sequence as a vector of chars 

    plot: if 'TRUE', it plots a histogram of the presence of residues
          with the physico-chemical properties: Tiny, Small, Aliphatic,
          Aromatic, Non-polar, Polar, Charged, Positive, Negative

_V_a_l_u_e:

     If plot is 'TRUE', it draws the histogram as described with the
     top. It returns a list with the  following components:  

   Compo: A factor giving the number of each residues.

    Prop: A list giving the percentage of each physico-chemical class
          of amino acid.

      Pi: The theoretical isoelectric point

_A_u_t_h_o_r(_s):

     D. Charif

_R_e_f_e_r_e_n_c_e_s:

     'citation("seqinr")'

_S_e_e _A_l_s_o:

     'computePI', 'SEQINR.UTIL', 'SeqFastaAA'

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

       ss = read.fasta(File=system.file("sequences/seqAA.fasta",package = "seqinr"),seqtype="AA")
       AAstat(ss[[1]])

