!   Draws a histogram from sample data
!
!   Copyright (C) 2004  Alan W. Irwin
!
!   This file is part of PLplot.
!
!   PLplot is free software; you can redistribute it and/or modify
!   it under the terms of the GNU Library General Public License as
!   published by the Free Software Foundation; either version 2 of the
!   License, or (at your option) any later version.
!
!   PLplot is distributed in the hope that it will be useful,
!   but WITHOUT ANY WARRANTY; without even the implied warranty of
!   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
!   GNU Library General Public License for more details.
!
!   You should have received a copy of the GNU Library General Public
!   License along with PLplot; if not, write to the Free Software
!   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

program x04fortran
    use plplot, PI => PL_PI
    use plfortrandemolib
    implicit none

    integer, parameter :: NPTS = 2047
    real(kind=plflt) :: data(NPTS), delta

!   Process command-line arguments
    call plparseopts(PL_PARSE_FULL)

!   Initialize plplot
    call plinit()

!   Fill up data points
    delta = 2.0_plflt * PI / dble (NPTS)
    data = sin(delta*arange(0, NPTS))

    call plcol0(1)
    call plhist(data, -1.1_plflt, 1.1_plflt, 44, 0)
    call plcol0(2)
    call pllab('#frValue','#frFrequency', &
      '#frPLplot Example 5 - Probability function of Oscillator')

    call plend
end program x04fortran
