

pnm(e1071)                                   R Documentation

_P_o_r_t_a_b_l_e _A_n_y_m_a_p _I_m_a_g_e_s

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

     `read.pnm' reads a pnm file and loads the image into an
     object of class `pnm', which is basically a matrix
     (pbm, pgm) or a 3-dimensional arry with 3 matrices for
     red, green and blue.

     `write.pgm' writes an object of class `pnm' to a pgm
     file. Generalizations for writing pbm and ppm files are
     yet to be written.

     `plot.pnm' plots a pnm object using the command
     `image'. The only difference is that the element
     `[1,1]' of `pnmobj' is plotted as the upper left corner
     (plain `image' would plot `[1,1]' as the lower left
     corner.

_U_s_a_g_e_:

     read.pnm(file)
     plot(pnmobj, xlab="", ylab="", axes=FALSE, ...)
     write.pgm(pnmobj, file="Rimage.pgm", forceplain=FALSE)

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

  pnmobj: an object of class `pnm'

    file: name of the pnm file

forceplain: If `TRUE', an ASCII pgm file is written. Default
          is to write a binary (raw) pgm file.

_V_a_l_u_e_:

     `read.pnm' returns an object of class `pnm'. The maxi-
     mum value (of either grey or the red/green/blue chan-
     nels) is stored as attribute `"maxval"'). The type
     (pbm, pgm or pnm) is stred as attribute `"type"').

_A_u_t_h_o_r_(_s_)_:

     Friedrich Leisch

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

     `image'

