load wavsheep
plot(tsh,sheep)
axis tight
title('"I saw the sheep."')
xlabel("Time (sec)")
ylabel("Amplitude")
wt = tqwt(sheep);
I was trying to run this sample code from matlab but I kept getting this error: Unrecognized function or variable 'tqwt'. Can someone help me find out the mistake?
tqwt is part of the Wavelet Toolbox and was introduced in R2021b. It will not exist if your version of MATLAB is older, or if you don’t have the Wavelet Toolbox installed.
Related
OK, I'm fairly new to the Matlab, and it's first time installing a custom toolbox. I'm using Matlab R2015a on 64-bit Windows machine and tried to install third-party toolbox. I used addpath C:\WhereToolboxUnpacked and then savepath
ver call shows that Toolbox is installed, however Matlab seem to cannot find a function from it! Simple example from here gives an error:
Undefined function 'model' for input arguments of type 'char'.
Error in run_my_model (line 10)
m = model('my_simple_rbc.model');
help model returns
help for xregdesign/model
It seems that this model is not from my installed toolbox.
I am trying to construct a decision tree. I tried using the fitctree function and wrote:
ctree = fitctree(TrainingX,TrainingY);
such that TrainingX is the input matrix and TrainingY is the target matrix. An error appears saying that:
Undefined function 'fitctree' for input arguments of type 'double'.
I don't know what is the problem and what should I do to solve it. Could you please help me?
The reason why it is undefined is because fitctree requires the Statistics Toolbox in MATLAB. If you don't have the Statistics Toolbox, you can't use this function and you're SOL. Sorry!
Even with the Statistics Toolbox, fitctree is only available for recent editions of MATLAB (R2014a+). Check the release notes on the Statistics Toolbox for more details: http://www.mathworks.com/help/stats/release-notes.html. Go to where R2014a is and fully expand out all of the facts by clicking on Expand All. Where you see "Functions for classification methods and clustering", you'll see an entry for fitctree there.
The only option would be to upgrade your version of MATLAB to at least R2014a or above.
Good luck!
I'm trying to compute the autocorrelation of my timeseries. This work on my laptop with matlab R2011a, but not on my desktop with matlab R2013a. I read somewhere that the Signal Processing Toolbox needs to be installed, and that is the case on both of my computers. There seems to be no function at all called autocorr, but I can find it again on the matworks documentation for 2014b. I have the same problem with xcorr, although matlab seems to recognize the function ('help xcorr' works, 'help autocorr' not).
How can I fix this?
I would like to use the function evalclusters from the statistics toolbox in matlab, but matlab is unable to find the function when I call it.
help evalclusters
returns 'evalclusters not found.'
The statistics toolbox is installed [license('test','statistics_toolbox') returns '1'].
Thanks!
evalclusters was added with Matlab 2013b and extended with 2014a, it is not available in Matlab 2013a.
In case upgrading Matlab is not an option, current Octave Statistics package includes it as well. (Open-Source alternative to Matlab which basically uses the same syntax)
I am trying to simulate a time series process using Matlab. For example, let's see the following example:
http://www.mathworks.com/help/econ/arima.print.html
When I run following code
model = arima(1,0,1);
[fit,VarCov] = estimate(model,Y,'print',false);
I get the following error:
??? Undefined function or method 'arima' for input arguments of type 'double'.
Does Matlab contain functions for Matlab? Can I calculate different functions,like calculate autocorrelation or autocovariance at different lag? Or estimate ARMA parameters?
You need to make sure that you have a license and code for the Econometrics Toolbox before using that function. MATLAB has annoying license requirements for both the main software and its various toolboxes :(
But, you may be able to find some public code that can do the same thing. Check out http://www.mathtools.net/