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! Simple demo of a 2D line plot.
!
! Copyright (C) 2011-2016 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
! N.B. the pl_test_flt parameter used in this code is only
! provided by the plplot module to allow convenient developer
! testing of either kind(1.0) or kind(1.0d0) floating-point
! precision regardless of the floating-point precision of the
! PLplot C libraries. We do not guarantee the value of this test
! parameter so it should not be used by users, and instead user
! code should replace the pl_test_flt parameter by whatever
! kind(1.0) or kind(1.0d0) precision is most convenient for them.
! For further details on floating-point precision issues please
! consult README_precision in this directory.
!
program x00f
use plfortrandemolib
integer, parameter :: NSIZE = 101
real(kind=pl_test_flt), dimension(NSIZE) :: x, y
real(kind=pl_test_flt) :: xmin = 0._pl_test_flt, xmax = 1._pl_test_flt, ymin = 0._pl_test_flt, ymax = 100._pl_test_flt
! integer :: i
integer :: plparseopts_rc
! Prepare data to be plotted.
x = arange(NSIZE) / real(NSIZE-1,pl_test_flt)
y = ymax * x**2
! Or alternatively, using a DO-loop
!do i = 1,NSIZE
! x(i) = real( i - 1, pl_test_flt ) / real( NSIZE - 1, pl_test_flt )
! y(i) = ymax * x(i)**2
!enddo
! Parse and process command line arguments
plparseopts_rc = plparseopts( PL_PARSE_FULL )
if(plparseopts_rc .ne. 0) stop "plparseopts error"
! Initialize plplot
call plinit
! Create a labelled box to hold the plot.
call plenv( xmin, xmax, ymin, ymax, 0, 0 )
call pllab( "x", "y=100 x#u2#d", "Simple PLplot demo of a 2D line plot" )
! Plot the data that was prepared above.
call plline( x, y )
! Close PLplot library
call plend
end program x00f
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