簡易 piano_GUI (使用switch-yard技巧)

自動儲存繪圖結果的圖形(AutoSaveFigure)

% 省略了很多MATLAB的GUI宣告(Source Code不完整)
% 在GUI裡使用了一個axes

posit = get(handles.figure1,'Position');
set(handles.figure1,'Color',[1 1 1]);  % 設背景顏色為白色
set(handles.axes1,'Position',[6 2 posit(3)-8 posit(4)-2.5]);  % Position中的數值為圖形的調整參數
for i = 3:10
    y = magic(i);
    plot([1:length(y(:))], y(:))
    drawnow;
    im = getframe(handles.figure1); % 擷取畫面
    imwrite(uint8(im.cdata),[num2str(i) '.png']);

end

% 圖形將存成3.png ~ 10.png

此外, 也可以使用script方式產生, 程式碼如下:

h1 = figure('Position', [10 10 450 300], 'Menubar', 'none', 'Name', 'AutoSave_figure');

set(h1, 'Color', 'white')  % 設背景顏色為白色

for i = 3:10

    y = magic(i)

    plot([1:max(y(:))], y(:));

    drawnow;

    im = getframe(h1); % 擷取畫面

    imwrite(uint8(im.cdata),[num2str(i) '.png']);

end

簡易 piano_GUI (使用GUIDE)

程式碼

function varargout = piano(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, 'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @piano_OpeningFcn, 'gui_OutputFcn',  @piano_OutputFcn, ...
                   'gui_LayoutFcn',  [] , 'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end

function piano_OpeningFcn(hObject, ~, handles, varargin)
global ff Fs t m;
Fs = 11025; t = 0:1/Fs:(1-1/Fs); m = exp(-(0:Fs-1)/3/Fs);
pitch = 60:72;
ff = fix(440 * 2.^((pitch - 69)/12));
handles.output = hObject;
guidata(hObject, handles);                                      % Update handles structure

function varargout = piano_OutputFcn(~, ~, handles)
varargout{1} = handles.output;

function pushbuttonE_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(5) * t).*m;  wavplay(y, Fs);

function pushbuttonC_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(1) * t).*m;  wavplay(y, Fs);

function pushbuttonD_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(3) * t).*m;  wavplay(y, Fs);

function pushbuttonF_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(6) * t).*m;  wavplay(y, Fs);

function pushbuttonG_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(8) * t).*m;  wavplay(y, Fs);

function pushbuttonA_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(10) * t).*m;  wavplay(y, Fs);

function pushbuttonB_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(12) * t).*m;  wavplay(y, Fs);

function pushbuttonC__Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(13) * t).*m;  wavplay(y, Fs);

function pushbutton1_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(2) * t).*m;  wavplay(y, Fs);

function pushbutton2_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(4) * t).*m;  wavplay(y, Fs);

function pushbutton3_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(7) * t).*m;  wavplay(y, Fs);

function pushbutton4_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(9) * t).*m;  wavplay(y, Fs);

function pushbutton5_Callback(~, ~, ~)
global ff t Fs m;  y = sin(2 * pi * ff(11) * t).*m;  wavplay(y, Fs);

function pushbutton6_Callback(~, ~, ~)