How do I call a plot from a function in a GUI?

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Stephanie
Stephanie 2012-12-6
Hi! I created a function that plots 3 different signals and an average of all the signals onto the same plot. This function works fine when I call it with an m file, but if I call it using my GUI I cannot get the plot to show up on my axes in the GUI. I must use the same function I created to run with my m file to be called with my GUI. Below is my function (noisysignals) and my GUI code.
Thanks!
MY FUNCTION
function noisysignals(a,b,c,d,e,g)
SR=500;
time=400./1000;
G=g/1000;
NumberofPoints=time.*SR;
increment=time./NumberofPoints;
t=0:increment:time;
x=b.*(t.^e).*exp(-t./G).*cos(2.*pi.*c.*t);
noise=rand(a,length(x)).*d;
copies=repmat(x,[a 1]);
copieswithnoise = copies+noise;
Average= mean(copieswithnoise);
hold on
line1 =plot (t,copieswithnoise (1,:), 'b', 'Linewidth', 1));
line2=plot (t,copieswithnoise (2,:), 'b', 'Linewidth', 1);
line3=plot (t,copieswithnoise (3,:), 'b', 'Linewidth', 1);
line4=plot ( t, Average, 'r', 'LineWidth', 3 );
hold off
title ('Signals With Noise','FontSize', 17);
xlabel ('Time (seconds)','FontSize', 12);
ylabel ('Voltage (Volts)','FontSize', 12);
legendHandle = [line1 line2 line3 line4];
legend(legendHandle([1 4]),'Individual Signals','Average of all Signals');
end
MY GUI (The important part- I skipped over defining each of my edit boxes)
--- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
hObject handle to pushbutton1 (see GCBO)
eventdata reserved - to be defined in a future version of MATLAB
handles structure with handles and user data (see GUIDATA)
N= str2double(get(handles.copies, 'string'));
amplitude= str2double( get(handles.Amplitude, 'string'));
frequency= str2double(get(handles.Frequency, 'string'));
gamma= str2double(get(handles.Gamma, 'string'));
tau= str2double(get(handles.Tau, 'string'));
standardD= str2double(get(handles.SD, 'string'));
noisysignals (N, amplitude, frequency, standardD, gamma, tau);

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采纳的回答

Stephanie
Stephanie 2012-12-6
I figured it out. It actually had absolutely nothing to do with my code. I had been entering my input A as 8.*10.^6 which worked fine in my function, but as soon as I entered it into my GUI it wouldn't work. Once I changed my A value to 8E6 it worked perfectly. Thanks for the help though!
  1 个评论
Muthu Annamalai
Muthu Annamalai 2012-12-6
You can use the function, 'eval' to check the input. But I don't recommend it. You should take user input as numbers instead.

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更多回答（1 个）

Muthu Annamalai
Muthu Annamalai 2012-12-6
编辑：Muthu Annamalai 2012-12-6
When using the GUI, you should create a new figure() and save the handle to it.
h = figure();
plot(h, x_axis, y_axis, label, etc.. )
So I'd keep all the code same but pass in the handle information as first argument, and you're all set!
See : http://www.mathworks.com/help/matlab/ref/figure.html and http://www.mathworks.com/help/matlab/ref/plot.html
  1 个评论
Stephanie
Stephanie 2012-12-6
Is this supposed to create an additional figure? When I tried this it created an additional figure, but I kept getting errors so the plot was blank. I need the plot to go in the axes in my GUI, not create an additional figure. Am I supposed to put that bit of code in my GUI or function?
Thanks
Here is what I have tried in my function:
h= figure (1);
hold on
plot (h,t,copieswithnoise (1,:), 'b', 'Linewidth', 1);
plot (h,t,copieswithnoise (2,:), 'b', 'Linewidth', 1);
plot (h,t,copieswithnoise (3,:), 'b', 'Linewidth', 1);
plot (h, t, Average, 'r', 'LineWidth', 3 );
hold off
And I got this error:
Error using plot
String argument is an unknown option.
Error in noisysignals (line 28)
plot (h,t,copieswithnoise (1,:), 'b', 'Linewidth', 1);
Error in RedoProblem2GUI>pushbutton1_Callback (line
230)
noisysignals (N, amplitude, frequency, gamma, tau,
standardD);
Error in gui_mainfcn (line 96)
feval(varargin{:});
Error in RedoProblem2GUI (line 42)
gui_mainfcn(gui_State, varargin{:});
Error in
@(hObject,eventdata)RedoProblem2GUI('pushbutton1_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback
I have tried a few other variations and keep getting similar results

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