Search found 194 matches
- Thu Sep 7, 2017 09:36
- Forum: Bugs
- Topic: nargoutchk: Not enough input arguments
- Replies: 1
- Views: 12474
Re: nargoutchk: Not enough input arguments
Hi, I think nargoutchk was introduced before MATLAB R2006a. But it seems that your MATLAB is too old and does not have this function. I suggest to write simple function called nargoutchk.m and put it into the CRPtool folder: function out = nargoutchk(in1,in2) % do nothing By doing this you only lose...
- Wed Apr 19, 2017 20:32
- Forum: General Discussion
- Topic: Asymmetry of FAN CRPs
- Replies: 1
- Views: 14758
Re: Asymmetry of FAN CRPs
Hi Mircea, you are right, when using the fixed number of neighbours (which is the original definition of an RP by Eckmann 1987) the RP is not symmetric. This should be clear because for recurrence pair i and j the k nearest neighbours of the state at time point i are not necessarily the k nearest ne...
- Tue Jan 24, 2017 10:56
- Forum: General Discussion
- Topic: CRQAD analyze
- Replies: 1
- Views: 14626
Re: CRQAD analyze
Hi,
it depends on the data. I assume that you somehow normalized the data beforehand.
Then, only look at the RR. RR is the probability of recurrence with respect to some lag. Therefore, in your case, I would chose lag +15.
Best
Norbert
it depends on the data. I assume that you somehow normalized the data beforehand.
Then, only look at the RR. RR is the probability of recurrence with respect to some lag. Therefore, in your case, I would chose lag +15.
Best
Norbert
- Mon Jan 9, 2017 14:40
- Forum: General Discussion
- Topic: CRP for aggregation?
- Replies: 3
- Views: 17223
Re: CRP for aggregation?
sounds more like feature extraction or support vector machines. I'm not an expert in this.
- Thu Jan 5, 2017 11:52
- Forum: Installation
- Topic: Fail to install.
- Replies: 5
- Views: 83066
Re: Fail to install.
It is better to send me an email with all information I would need to figure out the problem. (MATLAB version, operation system etc)
Thanks!
NM
Thanks!
NM
- Wed Dec 21, 2016 11:00
- Forum: Available Software
- Topic: Questions about multi-column input X in function crqa
- Replies: 1
- Views: 13273
Re: Questions about multi-column input X in function crqa
Hello Fan.Mi, thanks for your kind words. Regarding your question: it is something different when you calculate the RQA for each of the N channels separately or when you combine all N channels to one phase space trajectory (of then dimension N ), because then you get only one RQA result. It depends ...
- Tue Oct 25, 2016 07:40
- Forum: General Discussion
- Topic: CRP toolbox for more than two time series
- Replies: 4
- Views: 18171
Re: CRP toolbox for more than two time series
univariate means you analyse only one time series bivariate means you analyse two time series, e.g., correlation multivariate means you analyse more than one time series, usually more than two in your case, i guess you simply compare two time series, but all available pairs. your problem looks quit...
- Tue Oct 18, 2016 07:24
- Forum: General Discussion
- Topic: CRP toolbox for more than two time series
- Replies: 4
- Views: 18171
Re: CRP toolbox for more than two time series
Hi,
no, you can only compare two time series with a CRP. But what is your research question? I guess that a bivariate test is mostly sufficient.
Best
Norbert
no, you can only compare two time series with a CRP. But what is your research question? I guess that a bivariate test is mostly sufficient.
Best
Norbert
- Fri Oct 14, 2016 17:44
- Forum: Available Software
- Topic: Windows application to draw recurrence plots
- Replies: 2
- Views: 14807
Re: Windows application to draw recurrence plots
Hi Migul, great! Thanks for sharing the software and the code! I'm sure there are scientists who would like to use it. Perhaps you could add some instructions how to use the software and how to compile the source code and some note about the requirements to use the software (Win10?, 64bit?). I haven...
- Wed Oct 12, 2016 05:55
- Forum: General Discussion
- Topic: Theiler window
- Replies: 1
- Views: 15389
Re: Theiler window
Hi Marina, the Theiler window corrects only the recurrences that are close to the reference point. All other, "futher away" points are not corrected. For a RP it means that the Theiler window is a small band along the main diagonal. Therefore, it will only partly affect the LAM measure. Be...
- Mon Aug 29, 2016 14:47
- Forum: General Discussion
- Topic: CRP Toolbox for Visual Fixations - Set Threshold?
- Replies: 1
- Views: 14731
Re: CRP Toolbox for Visual Fixations - Set Threshold?
Hi,
you have to use the 'nonorm' option in the crp-function, e.g.,
Best wishes
Norbert
you have to use the 'nonorm' option in the crp-function, e.g.,
Code: Select all
r = crp2(data,m,tau,10,'nonorm');
Norbert
- Wed Jul 13, 2016 08:17
- Forum: Recurrence Plot Symposium
- Topic: Minisymposium on Recurrence Plots at the PNLD2016
- Replies: 0
- Views: 27099
Minisymposium on Recurrence Plots at the PNLD2016
We are organizing a Minisymposium on Recurrence Plots at the conference "Perspectives in Nonlinear Dynamics" (PNLD2016) in Berlin, July 24th–29th, 2016. The programm is now online: http://pnld2016.physik.hu-berlin.de/node/21
- Wed Jul 13, 2016 08:14
- Forum: Bugs
- Topic: Bug in Crqad.m
- Replies: 1
- Views: 13494
Re: Bug in Crqad.m
Hi David, thanks for the bug report. Yes, you are completely right. This code was not used so much, therefore I missed to include this "normalization" option in this function (although in the help text it is stated that this would work). I have now fixed this problem (R30.5). crqad allows ...
- Wed Jul 13, 2016 07:55
- Forum: Available Software
- Topic: Data file types for recurrence-plot.tk's online calculator
- Replies: 1
- Views: 12820
Re: Data file types for recurrence-plot.tk's online calculat
It is the most simple one. This means, an simple ASCII file with a column of numbers (or several columns).
Thanks for the hint. I will add a remark on the website.
Thanks for the hint. I will add a remark on the website.
- Wed Jul 13, 2016 07:45
- Forum: Applications
- Topic: EEG
- Replies: 11
- Views: 48924
Re: EEG
I would be careful when using embedding. Do not overembed because it will cause artefacts (spurious correlations in the RP and artificially many long lines). Therefore, I would probably use a low embedding dimension and delay for all channels (e.g., m=3, tau = 2). Final values depend on the data. It...