Search found 173 matches

by Norbert
Mon Jan 14, 2019 19:43
Forum: Recurrence Plot Workshop
Topic: 8th Recurrence Plot Symposium in China
Replies: 1
Views: 4231

Re: 8th Recurrence Plot Symposium in China

For the next symposium in 2019, we offer a scholarship for PhD students! More info: http://symposium.recurrence-plot.tk/?a=scholarship
by Norbert
Fri Aug 31, 2018 09:47
Forum: Quantification
Topic: Theiler window for vertical structures
Replies: 1
Views: 1677

Re: Theiler window for vertical structures

This is completely right. For the measures based on vertical structures, I suggest to include the LOI and not to apply the Theiler window. This should also be noted in the explanation of the method when a publication is prepared.
by Norbert
Fri Aug 31, 2018 09:45
Forum: Quantification
Topic: Denominator for Recurrence Rate
Replies: 1
Views: 1393

Re: Denominator for Recurrence Rate

This is really a good point. When the LOI is not excluded, the denominator is N × N . There are some special cases where this definition of RR is helpful. In other applications, it can be required to exclude the LOI, then the denominator is N ( N –1). Further, a Theiler window can be required, which...
by Norbert
Fri Aug 31, 2018 09:34
Forum: Multivariate Extensions and Spatial Data
Topic: Spatial data analysis
Replies: 2
Views: 3081

Re: Spatial data analysis

As far as I know, there is no public software for it. I myself have developed a C++ code but it is only for a pilot study and I need to check again whether it is maturated enough to be used for general purpose or other data. Moreover, the code is more than 10 years old …
by Norbert
Tue Mar 6, 2018 13:42
Forum: Recurrence Plot Workshop
Topic: 8th Recurrence Plot Symposium in China
Replies: 1
Views: 4231

8th Recurrence Plot Symposium in China

The eigth international recurrence plot symposium will be organized by the Jiangsu University in Nanjing, China, in August 21-23, 2019. The venue will be in Zhenjiang.

More information:
http://symposium.recurrence-plot.tk/
by Norbert
Sat Nov 18, 2017 22:23
Forum: General Discussion
Topic: Bands of white space in RPs
Replies: 1
Views: 2779

Re: Bands of white space in RPs

Hi Pier,

the empty region means that the states in this epoch do not occur at any other times. These state are unique. Perhaps you could also show us the time series?

Best
Norbert
by Norbert
Sat Nov 18, 2017 22:20
Forum: General Discussion
Topic: CRP for aggregation?
Replies: 3
Views: 4496

Re: CRP for aggregation?

No, it is not possible. The base of the CRP is the distance between two points (on two different phase space trajectories).
by Norbert
Thu Sep 7, 2017 09:40
Forum: Bugs
Topic: nargoutchk.m
Replies: 1
Views: 4110

Re: nargoutchk.m

Yes, sure. As long as you don't delete the install.m file, you can use it several times, also at other machines.
by Norbert
Thu Sep 7, 2017 09:39
Forum: Bugs
Topic: nargoutchk.m
Replies: 1
Views: 2462

Re: nargoutchk.m

by Norbert
Thu Sep 7, 2017 09:36
Forum: Bugs
Topic: nargoutchk: Not enough input arguments
Replies: 1
Views: 2345

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...
by Norbert
Wed Apr 19, 2017 20:32
Forum: General Discussion
Topic: Asymmetry of FAN CRPs
Replies: 1
Views: 3587

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...
by Norbert
Tue Jan 24, 2017 10:56
Forum: General Discussion
Topic: CRQAD analyze
Replies: 1
Views: 3275

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
by Norbert
Mon Jan 9, 2017 14:40
Forum: General Discussion
Topic: CRP for aggregation?
Replies: 3
Views: 4496

Re: CRP for aggregation?

sounds more like feature extraction or support vector machines. I'm not an expert in this. :?
by Norbert
Thu Jan 5, 2017 11:52
Forum: Installation
Topic: Fail to install.
Replies: 5
Views: 10376

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
by Norbert
Wed Dec 21, 2016 11:00
Forum: Available Software
Topic: Questions about multi-column input X in function crqa
Replies: 1
Views: 3406

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 ...