Data loading in MATLAB

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!

Answer 1

[Benjamin Großmann]

Hi,

have a look at uigetfile and uiopen which open a file selection dialog box. This should solve your issues.

Regards,

Benni

[Fedor Durnev]

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]

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

Answer 2

[Steven Lord]

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.

[Fedor Durnev]

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]

Managed to do that, many thanks!