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[Matlab GUI] Context Menu: right-click menu

Source URL
1. Programmatically
https://www.mathworks.com/help/matlab/ref/uicontextmenu.html

2. GUIDE
https://www.mathworks.com/help/matlab/creating_guis/creating-menus-in-a-guide-gui.html

[Matlab GUI] Implementing drag and drop

1. Using Java Swing (Matlab FileExchange)
http://jp.mathworks.com/matlabcentral/fileexchange/53511-drag---drop-functionality-for-java-gui-components

2. Drag and drop of the graphic objects
https://www.mathworks.com/matlabcentral/answers/94681-how-do-i-implement-drag-and-drop-functionality-in-matlab

3. Stackoverflow
https://stackoverflow.com/questions/36833181/drag-and-drop-files-in-matlab-gui

[Matlab] Bode plot without Control Toolbox

When it comes to Bode plot, it is easy to draw a Bode plot with control toolbox, but Not everybody can get this toolbox.
For those who don't have Control Toolbox, let's see how to draw a Bode plot with only basic Matlab functions.

Assuming that a transfer function is as below.
     1
  -------
   s + 1

Then, the magnitude and phase of the transfer function are neccsary for bode plot.
The magnitude and phase can be calculated by replacing s with jw.
where, j is the imaginary unit of complex number, and w is the frequency.

     1                                  1
  -------          -->         -----------
   s + 1                          j*w + 1

Possible matlab code for bode plot is as below.
--------------------------------------------------------
% Define frequency
freq = 0.01:0.01:1000;

% Transfer function
tf = 1 ./ (1 + i*freq);

% Magnitude
m = 20 * log10(abs(tf));

% Phase
phase = angle(tf);

% Plot
subplot(2,1,1)
semilogx(freq,m);
grid on
ylabel('Magnitude (dB)');

subplot(2,1,2)
semilogx(freq,phase);
grid on
ylabel('Phase (deg)');
xlabel('Frequency (rad/sec)');
--------------------------------------

As a result of the code above,

-----------------------------------------------------------------------

General method for Bode plot

% Define the numerator and denominator

num=[-0.1, -2.4, -181, -1950];

den = [1, 3.3, 990,2600];

tnum = [];

tden = [];

an = length(num);

bn = length(den);

% Numerator

for N = 1:1:an

    if num(N) > 0

        si ='+';

    elseif num(N) <0 p="">

        si = '';

    end

        

    temp = sprintf('%s%d%s%s%d ',si,num(N),'*','s.^',an-N);

    tnum = [tnum temp];

end

% Denominator

for N = 1:1:length(den)

    if den(N) > 0

        si ='+';

    elseif den(N) <0 p="">

        si = '-';

    end

        

    temp = sprintf('%s%d%s%s%d ',si,den(N),'*','s.^',bn-N);

    tden = [tden temp];

end

% Define a system transfer function

sys = @(s) eval(tnum)./ eval(tden);

% Define frequency as x 

w=0.01:0.01:1000;

% Magnitude (dB)

amp=20*log10(abs(sys(w*1i)));

% Phase

ang=angle(sys(w*1i))*180/pi;

% Plot using subplot

subplot(211)

semilogx(w,amp);

ylabel('Magnitude (dB)')

grid on

subplot(212)

semilogx(w,ang);

xlabel('frequency (rad/sec)')

ylabel('phase (deg)')

grid on

[Matlab] Plot the latitude and longitude information on Google Map

Source URL
1. https://www.mathworks.com/matlabcentral/fileexchange/27627-zoharby-plot-google-map
2. https://blogs.mathworks.com/pick/2012/05/04/plot-google-map/

Can download the function 'plot_google_map' from the source URL 1.

Example code 1.
lat = [48.8708 51.5188 41.9260 40.4312 52.523 37.982];
lon = [2.4131 -0.1300 12.4951 -3.6788 13.415 23.715];
plot(lon,lat,'.r','MarkerSize',20)
plot_google_map

Result 1
The result appears on new figure.

Example code 2
% load route data
load NatickToBOS

% plot route data
plot(Data001(:, 1), Data001(:, 2), 'r', 'LineWidth', 2);
line(Data001(1, 1), Data001(1, 2), 'Marker', 'o', ...
    'Color', 'b', 'MarkerFaceColor', 'b', 'MarkerSize', 10);
line(Data001(end, 1), Data001(end, 2), 'Marker', 's', ...
    'Color', 'b', 'MarkerFaceColor', 'b', 'MarkerSize', 10);
xlim([-71.4, -71]); axis equal off

% Google map
plot_google_map('maptype', 'roadmap');

zoomHandle = zoom;
set(zoomHandle, 'ActionPostCallback', @update_google_map);

Result 2
The result appears on new figure.

[Matlab GUI] Build simple Data Processing tool - 5/5

5. Clear the axes, and Move the figure to new figure (Undock)

After drawing a plot, you can either clear the plot or undock the plot from the axes.

1) Clear
function Clear_ClickedCallback(hObject, eventdata, handles)
% hObject    handle to Clear (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
try
    cla(all,'reset'); % Clear the entire axes and remove the y-axis
catch
    cla();
end
handles.legend = [];
legend off;
set(handles.axes1,'Position',handles.inipos);

2) Undock
function Undock_ClickedCallback(hObject, eventdata, handles)
% hObject    handle to Undock (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

warning('off');

fig_children = get(gcf,'children');
fig_Axes = findall(fig_children,'Type','Axes');
fig_legend = findall(fig_children,'Tag','legend');
fig = figure;

% copy an existing post from gui to new figure window
copyobj(fig_Axes,fig);

% Delete the legends because the size is not well-suited
dleg = findall(fig,'Tag','legend'); delete(dleg);

% Clear an offset in position of an existing post so it can be centered on a new figure window 
set(gca,'ActivePositionProperty','outerposition');
set(gca,'Units','normalized');
set(gca,'OuterPosition',[0 0 1 1]);
set(gca,'position',[0.1200 0.1100 0.790 0.8150]);

% Change the default logo on the new figure appeared.
try 
    imgPath = fullfile(pwd,'itk.jpg');
    javaFrame = get(handle(gcf),'JavaFrame');
    javaFrame.setFigureIcon(javax.swing.ImageIcon(imgPath)); 
catch
    if code == 1
        warndlg('1','error');
    elseif code == 2
        warndlg('2','error')
    end
end
% Set the legend on the new figure
l = legend('show'); set(l,'Interpreter','none');
warning('on');

Related Posts
0. Build simple plot tool
1. Create a tool layout in GUIDE
2. Load mat file in structure array, and Display the file list loaded on the listbox
3. Diplay variables of mat file, and Plot variables on the axes
4. How to add new plot to the existing plot, and Use dynamic legend
5. Clear the axes, and Move the figure to new figure (Undock)

[Matlab GUI] Build simple Data Processing tool - 4/5

4. How to add new plot to the existing plot, and Use dynamic legend

After selecting either one variable or two variables, we can both draw a plot and add the legend dynamically on the axes selected.

Example code
-----------------------------------------------------------
% Create a legend name
tleg = handles.legend(1:end-4);
yvar = get(handles.VariablesList,'String');
yvari = get(handles.VariablesList,'Value');
ytemp = yvar(yvari);
% Legend name: filename + variable name
leg = sprintf('%s%s%s',tleg,': ',ytemp{1});
% Get the data of y
result = handles.result;
y = result{yvari,1};

if isequal(checkp,1)% with x-axis variable selected
   % Get the data of x
   xn = get(handles.xVariables,'String');
   xi = get(handles.xVariables,'Value'); xn=xn{xi,1};
   x = result{xi,1};
   % Plot and update the legend dynamically
   pline = plot(handles.axes1,x,y,'DisplayName',leg);
   hl = legend(handles.axes1,'-DynamicLegend');
   xlabel(xn,'interpreter','none');
   ylabel(ytemp{1},'interpreter','none');
else % Without x variable
   % Plot and update the legend dynamically   
   pline = plot(handles.axes1,y,'DisplayName',leg);
   hl = legend(handles.axes1,'-DynamicLegend');
   ylabel(ytemp{1},'interpreter','none');
end
% Set the legend interpreter to none
set(hl,'Interpreter','none');


Related posts
0. Build simple plot tool.
1. Create a tool layout in GUIDE
2. Load mat file in structure array, and Display the file list loaded on the listbox
3. Display variables of mat file, and Plot variables on the axes
4. How to add new plot to the existing plot, and Use dynamic legend
5. Clear the axes, and Move the figure to new figure (Undock)