MATLAB: Does FMINCON hang and not allow me to kill the process using CTRL-C

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Why does FMINCON hang and not allow me to kill the process using CTRL-C?

When I run a script that makes a call to FMINCON, MATLAB freezes and CTRL-C does not seem to stop my program from running.

Best Answer

This is a bug in the Optimization Toolbox 2.1.1 (R12.1) that has been fixed in the Optimization Toolbox 2.2 (R13).

There are no known workarounds for previous versions of the Optimization Toolbox.

Related Solutions

MATLAB: Does MATLAB 7.0.1 (R14SP1) shut down completely when I type Ctrl+C to terminate the program

This bug has been fixed in Release 14 Service Pack 2 (R14SP2). For previous releases, please read below for any possible workarounds:

This problem has been fixed in R14SP2. If you are using an earlier version of MATLAB, please read the following:

We have verified this as a bug in MATLAB 7.0.1 (R14SP1) that affects the way the UIGETFILE and PAUSE functions interact with program termination using Ctrl+C. Currently there are no known workarounds.

MATLAB: Cant SOUND be interrupted using Ctrl-C

There are a couple of ways for achieving the ability to interrupt a playing audio file. The first way is by creating an object for playing audio using the AUDIOPLAYER command and then using PLAY and STOP commands to play or stop playing the file. Further, the PAUSE command can be used here to pause the audio file at a certain instant and the RESUME command can be used to resume playing from that instant. Below is an example that illustrates this using a sample audio file of Handel’s “Hallelujah Chorus”.

>>load handel;

>>player = audioplayer(y, Fs);

Now type this at the command prompt to play the file:

>>play(player)

To stop playing type this at the command prompt:

>>stop(player)

Also, to pause playing at any instant:

>>pause(player)

Then to resume playing after pause:

>>resume(player)

For further details on AUDIOPLAYER, please refer to the following documentation:

http://www.mathworks.com/help/matlab/ref/audioplayer.html

The second way is to use PLAYBLOCKING to play audio from an AUDIOPLAYER object that is created using the AUDIOPLAYER command. In this case, the audio file can be interrupted by using Ctrl-C. An example is shown below which also uses the sample audio file of Handel’s “Hallelujah Chorus”.

>>load handel;

>>playblocking(audioplayer(y,Fs))

To stop at any instant, use Ctrl-C.

If an audioplayer object is created explicitly then use a function instead to be able to interrupt using Ctrl+C.

This would not need the clearing of the audioplayer object using CLEAR command which is otherwise needed after hitting Ctrl+C to stop playing.

Example code:

function testAudio

 fs = 16000;

duration = 30;

x = randn(duration*fs,1);

x = x/max(abs(x));

ap = audioplayer(x,fs);

playblocking(ap);

end

>>testAudio

Best Answer

Related Solutions

MATLAB: Does MATLAB 7.0.1 (R14SP1) shut down completely when I type Ctrl+C to terminate the program

MATLAB: Cant SOUND be interrupted using Ctrl-C

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