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Gatsby
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function hAnnot = arrow(startPoint, endPoint, ax, arrowType, varargin)
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% ARROW Draws an annotation of specified type between two data points.
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%
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% hAnnot = ARROW(startPoint, endPoint, ax, arrowType) creates an
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% annotation from the coordinate specified by startPoint to the coordinate
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% specified by endPoint. The annotation type can be 'arrow', 'doublearrow',
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% 'textarrow', etc.
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%
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% hAnnot = ARROW(startPoint, endPoint, ax, arrowType, Name, Value) allows
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% additional customization of the annotation properties (e.g., color,
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% arrowhead size, line width, etc.).
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%
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% INPUT:
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% startPoint - 1x2 array, [x1, y1], coordinates of the start point
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% in the data space of the current axes.
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% endPoint - 1x2 array, [x2, y2], coordinates of the end point
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% in the data space of the current axes.
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% ax - (optional) Axes handle. If omitted, the current axes
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% (gca) will be used.
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% arrowType - (optional) Type of annotation ('arrow', 'doublearrow',
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% 'textarrow', etc.). Default is 'arrow'.
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% Name, Value - (optional) Name-value pairs to customize the annotation's
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% appearance (e.g., 'Color', 'LineWidth', etc.).
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%
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% OUTPUT:
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% hAnnot - Handle to the created annotation object.
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%
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% Example:
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% figure;
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% x = linspace(0, 10, 100);
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% y = sin(x);
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% plot(x, y);
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% arrow([2, sin(2)], [8, sin(8)], gca, 'textarrow', 'Color', 'r', 'String', 'Text');
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%
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% Notes:
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% The function automatically converts the data coordinates to normalized
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% figure coordinates for annotation purposes.
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% Input validation
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if nargin < 2
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error('arrow:InsufficientInputs', 'Both startPoint and endPoint must be specified.');
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end
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if nargin < 3 || isempty(ax)
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ax = gca; % If axes handle is not provided, use the current axes
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end
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if nargin < 4 || isempty(arrowType)
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arrowType = 'arrow'; % Default arrow type is 'arrow'
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end
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if numel(startPoint) ~= 2 || numel(endPoint) ~= 2
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error('arrow:InvalidInput', 'startPoint and endPoint must be 1x2 arrays representing [x, y] coordinates.');
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end
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% Get the current axes position in normalized figure units
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ax_pos = ax.Position;
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% Convert data coordinates to normalized figure coordinates
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startNorm = [(startPoint(1) - ax.XLim(1)) / diff(ax.XLim), ...
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(startPoint(2) - ax.YLim(1)) / diff(ax.YLim)];
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endNorm = [(endPoint(1) - ax.XLim(1)) / diff(ax.XLim), ...
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(endPoint(2) - ax.YLim(1)) / diff(ax.YLim)];
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% Map normalized data coordinates to figure normalized coordinates
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startAnnot = [ax_pos(1) + startNorm(1) * ax_pos(3), ...
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ax_pos(2) + startNorm(2) * ax_pos(4)];
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endAnnot = [ax_pos(1) + endNorm(1) * ax_pos(3), ...
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ax_pos(2) + endNorm(2) * ax_pos(4)];
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% Create the specified type of annotation
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hAnnot = annotation(arrowType, [startAnnot(1) endAnnot(1)], ...
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[startAnnot(2) endAnnot(2)], ...
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varargin{:}); % Pass additional name-value pairs
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end
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@@ -0,0 +1,45 @@
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clear; clc; close all;
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fig_config();
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%% Initiate test plot data
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x = linspace(0, 10, 14);
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% -- bounds
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upper_bound = ones(size(x)) * 4.5;
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lower_bound = upper_bound * 0.4
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% -- lines
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method_1_1 = upper_bound - (upper_bound - lower_bound) .* exp(-0.7 * x);
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method_1_2 = upper_bound - (upper_bound - lower_bound) .* exp(-0.5 * x);
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method_1_3 = upper_bound - (upper_bound - lower_bound) .* exp(-0.3 * x);
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method_2 = upper_bound - (upper_bound - lower_bound) .* exp(-0.5 * x) .* cos(x);
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%% Plot
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x_min = 0; x_max = 10;
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y_min = 2; y_max = 6;
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fig = figure(); hold on; box on; grid on;
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line_optimal = plot(x, upper_bound, 'k-', 'DisplayName', 'Optimal');
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line_method_1 = plot(x, method_1_1, '^b-', 'DisplayName', 'Method 1');
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plot(x, method_1_2, '^b--')
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plot(x, method_1_3, '^b-.')
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line_method_2 = plot(x, method_2, '*r-', 'DisplayName', 'Method 2');
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xlim([x_min, x_max]);
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ylim([y_min, y_max]);
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xticks(x_min:1:x_max);
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yticks(y_min:1:y_max);
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% -- Add arrow
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arrow([2.5, 4.2], [3.8, 3]);
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text(4, 3, '$\gamma = 1, 2, 3$')
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% -- Add legends and labels
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% h = findobj(fig, '-regexp', 'DisplayName', '.+');
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lgd = legend([line_optimal, line_method_1, line_method_2]);
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set(lgd, 'ItemTokenSize', [10, 5]);
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ylabel("$\mathbf{E}\left[S\right]$")
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xlabel("Rounds of Iteration")
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% -- export
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fig_export('example_matlab.pdf', 'pdf', '../../images')
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function fig_config(customConfig)
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% setFigureDefaults Sets default properties for all figures
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%
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% Usage:
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% fig_config() % Applies default settings
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% fig_config(userConfig) % Overrides defaults with userConfig
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%% Define default settings
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% In IEEETran, \textwidth is 7.1413 inches
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% - Use `\printinunitsof{in}\prntlen{\textwidth}`
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% - To output the \textwidth value in the generated document,
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% you need to use the `printlen` and `layouts` packages.
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textwidth_inches = 7.1413;
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% Set the figure width to 0.5 times \textwidth and define the aspect ratio (16:9 or 4:3)
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aspect = 16/9; % Aspect ratio (can also use 4/3)
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axes_width = 0.75;
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axes_hight = 0.75;
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axes_pos = [0.15, 0.15, axes_width, axes_hight];
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fig_width = 0.5 * textwidth_inches;
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fig_hight = (fig_width * axes_width / aspect) / axes_hight;
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defaultConfig = struct( ...
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'defaultFigureUnits', 'inches', ...
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'defaultFigurePosition', [0, 0, fig_width, fig_hight], ...
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'defaultAxesPosition', axes_pos, ...
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'defaultFigurePaperPositionMode', 'manual', ...
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'defaultFigurePaperUnits', 'inches', ...
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'defaultFigurePaperPosition', [0, 0, fig_width, fig_hight], ...
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'defaultFigurePaperSize', [fig_width, fig_hight], ...
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'defaultLineLineWidth', 0.5, ... % -- Line and marker
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'defaultLineMarkerSize', 3, ...
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'defaultAxesFontName', 'Times New Roman', ... % -- Fonts
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'defaultTextFontName', 'Times New Roman', ...
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'defaultLegendFontName', 'Times New Roman', ...
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'defaultAxesLabelFontSizeMultiplier', 1.15, ...
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'defaultAxesFontSize', 7, ...
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'defaultTextFontSize', 10, ...
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'defaultLegendFontSize', 7, ...
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'defaultTextInterpreter', 'latex', ... % -- Interpreter
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'defaultAxesTickLabelInterpreter', 'latex', ...
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'defaultLegendInterpreter', 'latex', ...
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'defaultAxesGridColor', [0.15, 0.15, 0.15], ... % -- Grid
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'defaultAxesGridAlpha', 0.25, ...
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'defaultAxesGridLineStyle', ':', ...
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'defaultAxesGridLineWidth', 0.5, ...
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'defaultArrowshapeHeadWidth', 6, ... % -- Arrow
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'defaultArrowshapeHeadLength', 6 ...
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);
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% Merge user config with defaults
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if nargin == 1 && ~isempty(customConfig)
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userFields = fieldnames(customConfig);
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for i = 1:length(userFields)
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defaultConfig.(userFields{i}) = customConfig.(userFields{i});
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end
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end
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% Iterate and set properties
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fields = fieldnames(defaultConfig);
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for i = 1:length(fields)
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try
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set(groot, fields{i}, defaultConfig.(fields{i}));
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catch ME
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errorStruct.message = sprintf("%s\nUse get(groot, 'factory') " + ...
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"to get all the available parameters.", ME.message);
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errorStruct.identifier = ME.identifier;
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errorStruct.stack = ME.stack;
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error(errorStruct)
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end
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end
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end
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function fig_export(filename, format, folder, dpi, fig)
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% EXPORT_CHART Save the current MATLAB figure or a specified figure in the selected image format.
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%
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% Parameters:
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% - filename (string, optional): The output file name. If it has no extension, one will be
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% added based on the format. If missing or empty, a default
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% name 'exported_plot' is used.
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% - format (string): The desired file format for the export. Default is 'pdf'.
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% Accepted formats are 'png', 'jpg', 'tiff', 'svg', 'pdf', 'esp'.
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% - folder (string): The directory where the image file will be saved. Default is the current directory.
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% - dpi (int): Resolution in dots per inch. Default is 96.
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% - fig (figure handle, optional): The MATLAB Figure object to export. If empty, the current active figure is used.
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%
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% Notes:
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% - The function creates the folder if it doesn't exist.
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% - Ensures compatibility with supported MATLAB formats.
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if nargin < 1 || isempty(filename)
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timestamp = char(datetime('now', 'Format','yyyyMMdd_HHmmSS'));
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filename = ['exported_plot_' timestamp];
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end
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if nargin < 2 || isempty(format)
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format = 'pdf';
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end
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if nargin < 3 || isempty(folder)
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folder = '.';
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end
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if nargin < 4 || isempty(dpi)
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dpi = 96;
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end
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if nargin < 5 || isempty(fig)
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fig = gcf;
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end
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% Add extension if missing
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[~, ~, ext] = fileparts(filename);
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if isempty(ext)
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filename = [filename '.' format];
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else
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format = ext(2:end); % Use extension for format
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end
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% Validate folder and create if necessary
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if ~exist(folder, 'dir')
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mkdir(folder);
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end
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% Construct full file path
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filepath = fullfile(folder, filename);
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% Format to '-d' option mapping
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supportedFormats = struct( ...
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'png', '-dpng', ...
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'jpg', '-djpeg', ...
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'tiff', '-dtiff', ...
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'svg', '-dsvg', ...
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'pdf', '-dpdf', ...
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'eps', '-depsc' ...
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);
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if ~isfield(supportedFormats, lower(format))
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error('Unsupported format "%s". Supported formats are: %s.', ...
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format, strjoin(fieldnames(supportedFormats), ', '));
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end
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% Get the corresponding '-d' option
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dOption = supportedFormats.(lower(format));
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% Attempt to save the figure
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try
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% Include resolution for raster formats
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if ismember(lower(format), {'png', 'jpg', 'tiff'})
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print(fig, filepath, dOption, ['-r' num2str(dpi)]);
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else
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print(fig, filepath, dOption);
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end
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fprintf('Exported image to: "%s" as %s\n', filepath, format);
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catch ME
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fprintf('Failed to export the figure: %s\n', ME.message);
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end
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end
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