Using an external function in GUI closes the interface

Hello!

I am using an external function I made outside GUI (heart_rate.m) and I am using it in a push button in GUI. The problem is that every time I press the button, the functions runs and returns the value I want, but after the interface just closes by itself.

At the moment the code is something really basic like this:

function pushbutton_connect_Callback(hObject, eventdata, handles)
   (..) 
   global HR;
   HR = heart_rate(data1,sr);
   msgbox(sprintf('Your heart rate is: %3.f', HR));

The msgbox appears and shows the correct number for data1, but then the thing just closes. I have also used a different external function just to test and the behaviour is the same.

Any idea on what is the problem? I am relatively new to guide, so I apologize in advance for any mistakes I may say :)

[Sara]

What's the code after the one you have posted? Try putting a breakpoint on the msgbox line and look at what happens when you proceed step by step.

[Joseph Cheng]

the whole gui closes? or just the msg box?

[Inês]

The whole gui closes. For this function there is only this portion of code, and its not connected with to any other function on gui as I am still testing it.

I narrowed to problem to the line where I call the function heart_rate. If I run the code without calling the function (i.e. comment that line) the message box appears and nothing closes. Otherwise when I run without the msgbox the interface closes down again.

If it helps, the function heart_rate is this one: heart_rate

Answer 1

[Geoff Hayes]

The heart_rate function, if like that in the above link, has as its first line

 close all; clc;clear all;

Calling close all would close the GUI yet still allow the message box to display. Try removing this line and re-running the application.

[Inês]

I forgot to mention that I had deleted that line to avoid such an error. Unfortunately the GUI still closes and no error is displayed :\

EDIT: just understood what the problem was. I edited heart_rate from the link and included some children functions, one of which had close all. Now it'a running.

Thanks Geoff! What a dumb mistake :)