I'm using the VideoWriter object to create a movie in Matlab. However, the movie file doesn't write until the program stops.
Is there any way to force it to write as it's going? Looking online I don't see anything.
I'm currently writing to as an avi but I don't care which format I use.
please specify your findings and search result for what you have already tried
Related
I'm trying to read a csv and gather two types of informations.
I need to read it once to get the number of lines that my csv contains.
I need to go back to the top of the csv and re read it again to retrieve the values.
I'm looking for something similar to seek(0) in java for bufferedSource
I've tried to close and re open the buffer but I think I'm overthiking it.
I also read through the source library but nothing came close to what I'm looking for.
PS:I know this is not optimized however my first read will basically enable me to create an array to store the values I'd retrive from the second read(and not a list).
I would take any clue you might have to offer !
Thanks a lot
I'm working on a script to convert a Simulink library to a plain model, meaning it can be simulated, it does not auto-lock etc.
Is there a way to do this with code aside from basically copy-pasting every single block into a new model? And if it isn't, what is the most efficient way to do the "copy-paste".
I was not able to find any clues as how to approach this problem here, or on Google, or on the official documentation or on the MathWorks forum so I'm at a loss on how to proceed.
Thank you in advance!
I don't think it's possible to convert a library to a model, but you can programmatically add library blocks to models like so:
sys = 'testModel';
new_system(sys);
open_system(sys);
add_block('Simulink/Sources/Sine Wave', [sys, '/MySineWave']);
save_system(sys);
close_system(sys);
sim(sys);
You could even use the find_system command to list all the blocks in a library and then loop through them all and create a new model for each using the above code.
does anybody know how to modify the buffer contents of
an AVAudioPCMBuffer object? I want to do the following:
load an audio file into an AVAudioPCMBuffer - this works.
modify the samples data of the AVAudioPCMBuffer. - here i stuck
write the AVAudioPCMBuffer to a file - this also works.
as in the documentation layed out, the AVAudioPCMBuffer.floatChannelData
is unfortunately read-only. Also the itAudio.audioBufferList.memory.mBuffers.mData seems to be read-only.
the compiler shows: cannot assign through subscript: subscript is get-only. currently i am using the audiotoolbox, which works fine for my
purposes. nevertheless i would like to ask if anybody knows the (best practice) way for doing this job?
thanks a lot for any help!!!
I am trying to use the Communications Toolbox in Matlab. In this toolbox there are a number of built in Systems Objects for example
1) comm.PSKModulator
I want to examine the .m file and see how these system objects are implemented. So I wrote down the command
open comm.PSMModulator
However, that doesnt help. Does anyone know why it doesn't work or maybe one cant access such code?
Update
When I write down which comm.PSKModulator I receive the following
/Applications/MATLAB_R2014a.app/toolbox/comm/comm/+comm/PSKModulator.p % comm.PSKModulator constructor
and where I write open comm.PSKModulator I get
Error using open (line 146)
File associated with
'/Applications/MATLAB_R2014a.app/toolbox/comm/comm/+comm/PSKModulator.p' not found.
Thanks
Some System objects may be implemented in C++ and does not have much to show in MATLAB code which might be the reason this is p-coded. You need to check the corresponding Simulink block documentation for description of the algorithm used. You can find documentation for M-PSK Modulator Baseband at http://www.mathworks.com/help/comm/ref/mpskmodulatorbaseband.html which has more description about the algorithm implemented.
I am trying to save a variable in .mat format and update and APPEND the NEW contents of THIS variable each time a loop is finished to avoid memory blow up. I have searched a bit and think the best way is structures. But still think there should be an straight way to do that. Anybody can give me an example to how to do that?
You could try using matfile to write without loading the file.