jchristopherson · jchristopherson · Oct 1, 2026 · Oct 1, 2026 · Oct 1, 2026 · Oct 1, 2026
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.24)
 project(
     fplot 
     LANGUAGES Fortran
-    VERSION 1.11.0
+    VERSION 1.12.0
 )
 
 

diff --git a/LICENSE b/LICENSE
diff --git a/doc/src/delaunay.f90 b/doc/src/delaunay.f90
@@ -1,3 +1,9 @@
+! Copyright (c) 2017-2026 Jason Christopherson for local modifications.
+! Original FORTRAN77 version by Barry Joe.
+! FORTRAN90 version by John Burkardt.
+! This code is distributed under the MIT license.
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module delaunay
     !! Provides a minimal, in-house implementation of the subset of the
     !! GEOMPACK library used by FPLOT to construct 2D Delaunay

diff --git a/doc/src/fplot_arrow.f90 b/doc/src/fplot_arrow.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_arrow
     use iso_fortran_env
     use fplot_plot_object

diff --git a/doc/src/fplot_colormap.f90 b/doc/src/fplot_colormap.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_colormap.f90
 
 module fplot_colormap

diff --git a/doc/src/fplot_colors.f90 b/doc/src/fplot_colors.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_colors.f90
 
 module fplot_colors

diff --git a/doc/src/fplot_constants.f90 b/doc/src/fplot_constants.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_constants
     use iso_fortran_env
     implicit none

diff --git a/doc/src/fplot_core.f90 b/doc/src/fplot_core.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_core
     !! FPLOT is a Fortran library providing a means of interacting with
     !! [GNUPLOT](http://www.gnuplot.info/) from a Fortran program.  The library

diff --git a/doc/src/fplot_core_routines.f90 b/doc/src/fplot_core_routines.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_core_routines.f90
 
 module fplot_core_routines

diff --git a/doc/src/fplot_delaunay_tri_surface.f90 b/doc/src/fplot_delaunay_tri_surface.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_delaunay_tri_surface.f90
 
 module fplot_delaunay_tri_surface

diff --git a/doc/src/fplot_errors.f90 b/doc/src/fplot_errors.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_errors
     use iso_fortran_env
     implicit none

diff --git a/doc/src/fplot_filled_plot_data.f90 b/doc/src/fplot_filled_plot_data.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_filled_plot_data.f90
 
 module fplot_filled_plot_data

diff --git a/doc/src/fplot_label.f90 b/doc/src/fplot_label.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_label.f90
 
 module fplot_label

diff --git a/doc/src/fplot_latex_terminal.f90 b/doc/src/fplot_latex_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_latex_terminal
     use iso_fortran_env
     use fplot_terminal

diff --git a/doc/src/fplot_legend.f90 b/doc/src/fplot_legend.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_legend.f90
 
 module fplot_legend

diff --git a/doc/src/fplot_multiplot.f90 b/doc/src/fplot_multiplot.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_multiplot.f90
 
 module fplot_multiplot

diff --git a/doc/src/fplot_pdf_terminal.f90 b/doc/src/fplot_pdf_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_pdf_terminal
     use iso_fortran_env
     use fplot_terminal

diff --git a/doc/src/fplot_plot.f90 b/doc/src/fplot_plot.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot.f90
 
 module fplot_plot

diff --git a/doc/src/fplot_plot_2d.f90 b/doc/src/fplot_plot_2d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_2d.f90
 module fplot_plot_2d
     use iso_fortran_env

diff --git a/doc/src/fplot_plot_3d.f90 b/doc/src/fplot_plot_3d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_3d.f90
 
 module fplot_plot_3d

diff --git a/doc/src/fplot_plot_axis.f90 b/doc/src/fplot_plot_axis.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_axis.f90
 
 module fplot_plot_axis

diff --git a/doc/src/fplot_plot_bar.f90 b/doc/src/fplot_plot_bar.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_bar.f90
 
 module fplot_plot_bar

diff --git a/doc/src/fplot_plot_data.f90 b/doc/src/fplot_plot_data.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_data.f90
 
 module fplot_plot_data

diff --git a/doc/src/fplot_plot_data_2d.f90 b/doc/src/fplot_plot_data_2d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_plot_data_2d
     use iso_fortran_env
     use fplot_plot_data

diff --git a/doc/src/fplot_plot_data_3d.f90 b/doc/src/fplot_plot_data_3d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_plot_data_3d
     use iso_fortran_env
     use fplot_plot_data

diff --git a/doc/src/fplot_plot_data_bar.f90 b/doc/src/fplot_plot_data_bar.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_data_bar.f90
 
 ! TO DO:

diff --git a/doc/src/fplot_plot_data_box_whisker.f90 b/doc/src/fplot_plot_data_box_whisker.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_plot_data_box_whisker
     use iso_fortran_env
     use fplot_plot_data

diff --git a/doc/src/fplot_plot_data_error_bars.f90 b/doc/src/fplot_plot_data_error_bars.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_data_error_bars.f90
 
 module fplot_plot_data_error_bars

diff --git a/doc/src/fplot_plot_data_function.f90 b/doc/src/fplot_plot_data_function.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_plot_data_function
     use iso_fortran_env
     use fplot_plot_data

diff --git a/doc/src/fplot_plot_data_histogram.f90 b/doc/src/fplot_plot_data_histogram.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_data_histogram.f90
 
 ! TO DO:

diff --git a/doc/src/fplot_plot_data_tri_2d.f90 b/doc/src/fplot_plot_data_tri_2d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_plot_data_tri_2d.f90
 
 module fplot_plot_data_tri_2d

diff --git a/doc/src/fplot_plot_object.f90 b/doc/src/fplot_plot_object.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_plot_object
     use iso_fortran_env
     implicit none

diff --git a/doc/src/fplot_plot_polar.f90 b/doc/src/fplot_plot_polar.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_polar.f90
 
 module fplot_plot_polar

diff --git a/doc/src/fplot_png_terminal.f90 b/doc/src/fplot_png_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_png_terminal.f90
 
 module fplot_png_terminal

diff --git a/doc/src/fplot_qt_terminal.f90 b/doc/src/fplot_qt_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_qt_terminal.f90
 
 module fplot_qt_terminal

diff --git a/doc/src/fplot_simplify.f90 b/doc/src/fplot_simplify.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_simplify.f90
 
 ! References:

diff --git a/doc/src/fplot_stats_plots.f90 b/doc/src/fplot_stats_plots.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_stats_plots
     use iso_fortran_env
     use fplot_plot_object

diff --git a/doc/src/fplot_surface_plot.f90 b/doc/src/fplot_surface_plot.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_surface_plot.f90
 
 module fplot_surface_plot

diff --git a/doc/src/fplot_surface_plot_data.f90 b/doc/src/fplot_surface_plot_data.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_surface_plot_data
     use iso_fortran_env
     use fplot_plot_data

diff --git a/doc/src/fplot_svg_terminal.f90 b/doc/src/fplot_svg_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_svg_terminal
     use iso_fortran_env
     use fplot_terminal

diff --git a/doc/src/fplot_terminal.f90 b/doc/src/fplot_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_terminal.f90
 
 module fplot_terminal

diff --git a/doc/src/fplot_tri_surface_plot_data.f90 b/doc/src/fplot_tri_surface_plot_data.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_tri_surface_plot_data.f90
 
 module fplot_tri_surface_plot_data

diff --git a/doc/src/fplot_triangulations_delaunay_2d.f90 b/doc/src/fplot_triangulations_delaunay_2d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 module fplot_triangulations_delaunay_2d
     use iso_fortran_env
     use delaunay

diff --git a/doc/src/fplot_vector_field_plot_data.f90 b/doc/src/fplot_vector_field_plot_data.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_vector_field_plot_data.f90
 ! REF:
     ! http://www.gnuplotting.org/vector-field-from-data-file/

diff --git a/doc/src/fplot_windows_terminal.f90 b/doc/src/fplot_windows_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_windows_terminal.f90
 
 module fplot_windows_terminal

diff --git a/doc/src/fplot_wxt_terminal.f90 b/doc/src/fplot_wxt_terminal.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_wxt_terminal.f90
 
 module fplot_wxt_terminal

diff --git a/examples/arrow_example.f90 b/examples/arrow_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use fplot_core
     use iso_fortran_env

diff --git a/examples/bar_plot_example.f90 b/examples/bar_plot_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core

diff --git a/examples/box_whisker_example.f90 b/examples/box_whisker_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core

diff --git a/examples/clear_plot_example.f90 b/examples/clear_plot_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core

diff --git a/examples/colored_vector_plot_example.f90 b/examples/colored_vector_plot_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core

diff --git a/examples/correlation_plot_example.f90 b/examples/correlation_plot_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core

diff --git a/examples/custom_colormap_example.f90 b/examples/custom_colormap_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use fplot_core
     use iso_fortran_env

diff --git a/examples/data_dependent_colors_2d.f90 b/examples/data_dependent_colors_2d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core

diff --git a/examples/data_dependent_colors_3d.f90 b/examples/data_dependent_colors_3d.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_3d_clr_1.f90
 
 program example

diff --git a/examples/error_bar_example.f90 b/examples/error_bar_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 ! fplot_err_1.f90
 
 program example

diff --git a/examples/fill_between_curves_example.f90 b/examples/fill_between_curves_example.f90
@@ -1,3 +1,6 @@
+! Copyright (c) 2017-2026 Jason Christopherson
+! Licensed under the MIT License. See the LICENSE file in the project root.
+
 program example
     use iso_fortran_env
     use fplot_core