I want to create object of video file. I found that VideoReader is used to create object but it shows error when I try to run it "Undefined Command/Function 'VideoReader'".
Can anyone please tell me how can I install the missing library to run VideoReader.
I am new to Matlab and I didn't find any useful information on net.
Thanks,
Anubhav
It means that your version of MATLAB doesn't have the function 'VideoReader', which only appears after R2010b.
Use mmreader instead, or get a latest version of MATLAB.
http://www.mathworks.com/help/techdoc/rn/bskfo3t.html#bsmnaxp-1
Related
I have a code in MATLAB that I need to run once to get some quick reference results. This code uses dsearch(), and I relized that this function has become deprecated and has been substituted by dsearchn(). I tried to follow some suggestions to make it work but I didn't succeed (it's my absolute first time with MATLAB) and I just need to run this code once to get some numbers. Which MATLAB versione should I install to make it work?
dsearch was removed in MATLAB R2012a, therefore you may use any version of MATLAB before R2012a.
If you have an active MathWorks account, you may access the documentation archive here.
According to MathWork's release notes, this function started printing a warning on release 2010a. So you should be fine either using it or a previous version.
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've recently been using the surfnorm function and would like to access the code to see what it's actually doing. I assume it's stored on my PC somewhere, but I don't know where.
Type in edit surfnorm to open it or which surfnorm to display the path.
I am a student who is envolving in a research about robust visual tracking.
And these days ,I had met a problem in my study.
The teacher gave me a project of matlab code about the research, when I try to run this code, and the program error is as follows:
??? Attempt to execute SCRIPT mexLasso as a function:
F:\L1_Tracking_standard_car\mexLasso.m
Error in ==> L1Tracking_release at 95
c = mexLasso(Y(:,i), [A fixT], param);
Error in ==> demo at 46
tracking_res = L1Tracking_release( s_frames, sz_T, n_sample, init_pos,
res_path, fcdatapts);
When I go to the program tracking, I found that mexLasso function does not exist, Only get an empty mexLasso.m file and a mexLasso.mexw32 files.
My OS version is Windows 7 64bit,and the matlab is matlab 7.12.0 r2011a
Does anybody here knows the causes of my problem?
Anymore, I wonder if anybody knows who has the source code of the binary file mexLasso.mexw32.Because I thought that if I can get the source code of the file mexLasso.mexw32,then I could compile its 64 bit version myself.(I doubt that my os could not recognize the .mexw32 file.)
I hope my express clear enough to let you come to help me ,thanks a lot!
I think your analysis is basically correct - mexLasso is intended to be a MEX function, but MATLAB is finding only mexLasso.m which presumably contains help text. Unfortunately, the error you're getting isn't terribly helpful. As I see it, you have two options:
Obtain the source code for mexLasso and recompile on WIN64
Run the WIN32 version of MATLAB on your WIN64 machine
the function mexLasso comes from the SPAMS toolbox
http://www.di.ens.fr/willow/SPAMS/.
You can find the sources there and compile the mex file corresponding to your OS.
First, you need to find mexLasso.cpp file in http://spams-devel.gforge.inria.fr/downloads.html as Marial has already mentioned.
Then you can find and download the recent version of SPAMS.
A following stage is just to execute compile.m file on your MATLAB.
Finally you can find mexLasso.mexw64 in the build folder.
Good luck.
When I tried to run a Simulink program under my R2009a Matlab, it showed an error message as follows: Failed to find library 'powerlib' referenced by 'dcmotor_openloop/Armature Current '. This library must be on your MATLAB path.
I'm wondering where I can find this powerlib.
As #Edric mentioned, powerlib is built into SimPowerSystems. The error you see can thus have two causes
(1) There is no installation of SimPowerSystems in your copy of Matlab. Type ver at the command prompt to check for what toolboxes you have installed. If SimPowerSystems doesn't show up in the list, you will have to get the toolbox, otherwise you won't be able to run the model.
(2) Your installation of SimPowerSystems is somehow corrupt. This has never happened to me in Matlab so far, but with modern technology, anything is possible. A fresh install should solve this.
powerlib is a Simulink library shipped as part of SimPowerSystems, see the product page here: http://www.mathworks.com/products/simpower/.
This should really be a comment on another answer, but I can't comment due to reputation.
From at least R2016b, perhaps earlier too, It's no longer called SimPowerSystems. It's now SimscapePowerSystems. You need that plus the bare Simscape package installed.