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Data loading in MATLAB

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Hello, I have some issues with data loading.
I have created a figure with some pushbuttons and axes.
Is it possible to load some data for plot building not simply using Y=load('my data.dat') in code?
I mean is it possible to make a button with a function which can open a window where I can choose any file which I want to load? (hope you understand what I am talking about)
Or perhaps, is it possible to make uicontrol where I can put file name and then push the button to load this data and make a plot? I tried to make something following this idea, but failed.
Thank you for help!

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Accepted Answer

Benjamin Großmann
Benjamin Großmann on 4 Feb 2020
Hi,
have a look at uigetfile and uiopen which open a file selection dialog box. This should solve your issues.
Regards,
Benni

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Fedor Durnev
Fedor Durnev on 4 Feb 2020
uiopen helped, but what's next? How to import this data in the right way, because I need to use it for plot building?
Fedor Durnev
Fedor Durnev on 4 Feb 2020
What should I fix here?
I guess, something with 'load' but I don't know how
function ECGButtonPushed(src,event)
uiopen;
hold on;
Y=load("Normal ECG.dat");
LY=length(Y);
Fd=500;
T=1/Fd;
tmax=LY*T;
t=0:T:tmax-T;
for i=1:LY
Y(i)=Y((i-1)+1);
end
pos1 = [0.05 0.65 0.4 0.3];
subplot('Position',pos1)
plot(t,Y)
xlabel('time,s');
ylabel('ECG,mV');
set(gca,'XLim',[0 20]);
hold on
title('ECG')
end

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More Answers (1)

Steven Lord
Steven Lord on 4 Feb 2020
Loading the data could be as simple as calling load. The more challenging part is likely to be sharing this data among the various components of your UI. If you're using App Designer, see this documentation page for a description of how to share data between component callbacks. If you're using GUIDE or creating the UI programmatically, see this page instead.

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Fedor Durnev
Fedor Durnev on 5 Feb 2020
Thank you for your answer!
What should I fix here? I guess, something with 'load' but I don't know how function ECGButtonPushed(src,event) uiopen; hold on; Y=load("Normal ECG.dat"); LY=length(Y); Fd=500; T=1/Fd; tmax=LY*T; t=0:T:tmax-T; for i=1:LY Y(i)=Y((i-1)+1); end pos1 = [0.05 0.65 0.4 0.3]; subplot('Position',pos1) plot(t,Y) xlabel('time,s'); ylabel('ECG,mV'); set(gca,'XLim',[0 20]); hold on title('ECG') end
Fedor Durnev
Fedor Durnev on 5 Feb 2020
Managed to do that, many thanks!

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