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! Simple line plot and multiple windows demo.
!
! Copyright (C) 2004-2016 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 x01f
use plplot, double_PI => PL_PI
use :: iso_fortran_env, only: stdout => output_unit
use plfortrandemolib
implicit none
real(kind=pl_test_flt), parameter :: PI = double_PI
real(pl_test_flt) :: xscale, yscale, xoff, yoff
character(len=80) :: version
integer :: digmax
logical, parameter :: locate_mode = .false.
logical, parameter :: pl_parse_dynamic = .false.
logical, parameter :: pl_parse_static_length = .false.
logical, parameter :: pl_parse_static = .false.
! Declarations for general parsing of the command line
integer arg_count, nargv
character(len=200), dimension(0:20) :: argv_static
character(len=200), dimension(:), allocatable :: argv_static_length
character(len=:), dimension(:), allocatable :: argv_dynamic
type(PLGraphicsIn) :: gin
integer :: PLK_Escape
integer :: plget_arguments_rc, plparseopts_rc
data PLK_Escape /Z'1B'/
! Process command-line arguments
if(pl_parse_dynamic) then
write(0,*) "pl_parse_dynamic = ", pl_parse_dynamic
plget_arguments_rc = plget_arguments(argv_dynamic)
if(plget_arguments_rc /= 0) stop "plget_arguments error"
nargv = size(argv_dynamic) - 1
write(*, '(a)') "argv before call to plparseopts(..., PL_PARSE_SKIP)"
do arg_count = 0, nargv
write(*,'(a,i4,a,a)') "i =", arg_count, ", argument = ", trim(argv_dynamic(arg_count))
enddo
plparseopts_rc = plparseopts(argv_dynamic, PL_PARSE_SKIP)
if(plparseopts_rc /= 0) stop "plparseopts error"
nargv = size(argv_dynamic) - 1
write(*, '(a)') "argv after call to plparseopts(..., PL_PARSE_SKIP)"
do arg_count = 0, nargv
write(*,'(a,i4,a,a)') "i =", arg_count, ", argument = ", trim(argv_dynamic(arg_count))
enddo
deallocate(argv_dynamic)
elseif(pl_parse_static_length) then
write(0,*) "pl_parse_static_length = ", pl_parse_static_length
plget_arguments_rc = plget_arguments(argv_static_length, 1)
if(plget_arguments_rc /= 0) stop "plget_arguments error"
nargv = size(argv_static_length) - 1
write(*, '(a)') "argv before call to plparseopts(..., PL_PARSE_SKIP)"
do arg_count = 0, nargv
write(*,'(a,i4,a,a)') "i =", arg_count, ", argument = ", trim(argv_static_length(arg_count))
enddo
plparseopts_rc = plparseopts(argv_static_length, PL_PARSE_SKIP, 1)
if(plparseopts_rc /= 0) stop "plparseopts error"
nargv = size(argv_static_length) - 1
write(*, '(a)') "argv after call to plparseopts(..., PL_PARSE_SKIP)"
do arg_count = 0, nargv
write(*,'(a,i4,a,a)') "i =", arg_count, ", argument = ", trim(argv_static_length(arg_count))
enddo
deallocate(argv_static_length)
elseif(pl_parse_static) then
write(0,*) "pl_parse_static = ", pl_parse_static
plget_arguments_rc = plget_arguments(nargv, argv_static)
if(plget_arguments_rc /= 0) stop "plget_arguments error"
write(*, '(a)') "argv before call to plparseopts(..., PL_PARSE_SKIP)"
do arg_count = 0, nargv
write(*,'(a,i4,a,a)') "i =", arg_count, ", argument = ", trim(argv_static(arg_count))
enddo
plparseopts_rc = plparseopts(nargv, argv_static(0:nargv), PL_PARSE_SKIP)
if(plparseopts_rc /= 0) stop "plparseopts error"
write(*, '(a)') "argv after call to plparseopts(..., PL_PARSE_SKIP)"
do arg_count = 0, nargv
write(*,'(a,i4,a,a)') "i =", arg_count, ", argument = ", trim(argv_static(arg_count))
enddo
else
plparseopts_rc = plparseopts(PL_PARSE_SKIP)
if(plparseopts_rc .ne. 0) stop "plparseopts error"
endif
! Print plplot version
call plgver(version)
write (*,'(a,a)') 'PLplot library version: ', trim(version)
! Initialize plplot
! Divide page into 2x2 plots
call plstar(2,2)
! Set up the data
! Original case
xscale = 6._pl_test_flt
yscale = 1._pl_test_flt
xoff = 0._pl_test_flt
yoff = 0._pl_test_flt
! Do a plot
call plot1()
! Set up the data
xscale = 1._pl_test_flt
yscale = 0.0014_pl_test_flt
yoff = 0.0185_pl_test_flt
! Do a plot
digmax = 5
call plsyax(digmax, 0)
call plot1()
call plot2()
call plot3()
if( locate_mode ) then
do while(.true.)
! plGetCursor returns zero value for some devices (e.g., xwin) when
! the user hits the escape key or hits a mouse button or key when outside
! a subwindow.
if( plGetCursor( gin ) == 0 ) exit
! For some devices (e.g., xcairo) plGetCursor always returns 0, but if the user hits the escape
! key or hits a mouse button or key when outside a subwindow, the returned keysym is PLK_escape
if( gin%keysym == PLK_escape ) exit
write(stdout, "(a,i3,a,f0.6,a,f0.6,a,f0.6,a,f0.6)") &
"subwin = ", gin%subwindow, ", wx = ", gin%wX, ", wy = ", gin%wY, &
", dx = ", gin%dX, ", dy = ", gin%dY
write(stdout, "(a,z0,a,z0,a,a,z0,a,z0)") &
"keysym = 0x", gin%keysym, ", button = 0x", gin%button, ", string = '"//trim(gin%string)//"'", &
", type = 0x", gin%type, ", state = 0x", gin%state
enddo
end if
! Don't forget to call PLEND to finish off!
call plend()
contains
!======================================================================
subroutine plot1()
real(pl_test_flt), dimension(1:60) :: x, y
real(pl_test_flt) :: xmin, xmax, ymin, ymax
x = xoff + xscale * arange(1,size(x)+1) / real(size(x),pl_test_flt)
y = yoff + yscale * x ** 2
xmin = minval(x)
xmax = maxval(x)
ymin = minval(y)
ymax = maxval(y)
! Set up the viewport and window using PLENV. The range in X is
! 0.0 to 6.0, and the range in Y is 0.0 to 30.0. The axes are
! scaled separately (just = 0), and we just draw a labelled
! box (axis = 0).
call plcol0(1)
call plenv( xmin, xmax, ymin, ymax, 0, 0 )
call plcol0(2)
call pllab( '(x)', '(y)', '#frPLplot Example 1 - y=x#u2' )
! Plot the data points
! Only plot every tenth!
call plcol0(4)
call plpoin( x(4::10), y(4::10), 9 )
! Draw the line through the data
call plcol0(3)
call plline( x, y )
end subroutine plot1
!======================================================================
subroutine plot2()
real(pl_test_flt), dimension(1:100) :: x, y
!
! Set up the viewport and window using PLENV. The range in X is
! -2.0 to 10.0, and the range in Y is -0.4 to 2.0. The axes are
! scaled separately (just = 0), and we draw a box with axes
! (axis = 1).
call plcol0(1)
call plenv(-2.0_pl_test_flt, 10.0_pl_test_flt, -0.4_pl_test_flt, 1.2_pl_test_flt, 0, 1 )
call plcol0(2)
call pllab( '(x)', 'sin(x)/x', '#frPLplot Example 1 - Sinc Function' )
! Fill up the arrays
x = ( arange(size(x)) - 19 ) / 6.0_pl_test_flt
y = merge( sin(x) / x, 1.0_pl_test_flt, x /= 0.0_pl_test_flt )
! Draw the line
call plcol0(3)
call plwidth(2._pl_test_flt)
call plline( x, y )
call plwidth(1._pl_test_flt)
end subroutine plot2
!======================================================================
subroutine plot3()
!
! For the final graph we wish to override the default tick intervals,
! and so do not use_ PLENV
real(pl_test_flt), dimension(1:101) :: x, y
call pladv(0)
! Use_ standard viewport, and define X range from 0 to 360 degrees,
! Y range from -1.2 to 1.2.
call plvsta()
call plwind( 0.0_pl_test_flt, 360.0_pl_test_flt, -1.2_pl_test_flt, 1.2_pl_test_flt )
! Draw a box with ticks spaced 60 degrees apart in X, and 0.2 in Y.
call plcol0(1)
call plbox( 'bcnst', 60.0_pl_test_flt, 2, 'bcnstv', 0.2_pl_test_flt, 2 )
! Superimpose a dashed line grid, with 1.5 mm marks and spaces. With
! only a single mark and space element, we do not need arrays
call plstyl( (/1500/), (/1500/) )
call plcol0(2)
call plbox( 'g', 30.0_pl_test_flt, 0, 'g', 0.2_pl_test_flt, 0 )
call plstyl( (/integer ::/), (/integer ::/) )
call plcol0(3)
call pllab( 'Angle (degrees)', 'sine', '#frPLplot Example 1 - Sine function' )
x = 3.6_pl_test_flt * arange(size(x))
y = sin( x * PI/180.0_pl_test_flt )
call plcol0(4)
call plline( x, y )
end subroutine plot3
end program x01f
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