Search found 194 matches

by Norbert
Wed Sep 20, 2023 20:24
Forum: Recurrence Plot Symposium
Topic: 11th Recurrence Plot Symposium in Mexico
Replies: 0
Views: 25755

11th Recurrence Plot Symposium in Mexico

The next symposium (in 2025) will be most likely in Mexico City.
by Norbert
Thu Mar 9, 2023 07:59
Forum: Multivariate Extensions and Spatial Data
Topic: Multivariate non-time series
Replies: 1
Views: 50912

Re: Multivariate non-time series

Similar to this previous question: (http://forum.recurrence-plot.tk/viewtopic.php?f=4&t=3591). I'd like to take multivariate data (independent feature1, feature2, ..., featureN) and convert each row into an image for classification. There are perhaps 10 features as well as a dependent variable,...
by Norbert
Wed Jan 11, 2023 12:25
Forum: Recurrence Plot Symposium
Topic: 10th Recurrence Plot Symposium in Japan
Replies: 1
Views: 37751

Re: 10th Recurrence Plot Symposium in Japan

We would like to announce the 10th International Symposium on Recurrence Plots which will be held at the National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan, August 28-30, 2023; as a satellite conference of ICIAM 2023 in Tokyo. For the moment, we plan a regular conferenc...
by Norbert
Fri May 6, 2022 20:55
Forum: Quantification
Topic: Clustering coefficient and Transitivity
Replies: 3
Views: 64955

Re: Clustering coefficient and Transitivity

UAFredens wrote: Fri Apr 8, 2022 11:44 Referring to Reference Manual Version 5.22, Release 32, are there any scientific papers defing or discussing "local recurrence rate" and RQA measure #13, Transitivity?
see answer at http://forum.recurrence-plot.tk/viewtop ... 6748#p6748
by Norbert
Mon May 2, 2022 08:19
Forum: Quantification
Topic: Transitivity?
Replies: 1
Views: 5994

Re: Transitivity?

Referring to Reference Manual Version 5.22, Release 32, are there any scientific papers defing or discussing "local recurrence rate" and RQA measure #13, Transitivity? There are not so many on the local RR (although I have included it in my lectures on recurrence analysis). The first one ...
by Norbert
Mon Mar 21, 2022 11:08
Forum: General Discussion
Topic: function for general synchronization
Replies: 1
Views: 56363

Re: function for general synchronization

Dear sir, I wanted to ask if there exists any function in the CRP toolbox to compute GPR for general synchronization like there exists CPR for phase synchronization? No, because the calculation is so easy. You have simply to calculate the RPs of the individual systems and multiply them to get the J...
by Norbert
Fri Jan 28, 2022 22:21
Forum: General Discussion
Topic: Installation in HPC
Replies: 1
Views: 6125

Re: Installation in HPC

Hi, I'm not sure about the architecture of your HPC. But in our system,we have a login node where I can install and test software. Then, when submitting the job, the used nodes are able to access the same folder. Thus, no problem. In your case, as far as I understand, you have no access to the used ...
by Norbert
Fri Jan 21, 2022 21:48
Forum: General Discussion
Topic: unthresholded recurrence plots images
Replies: 1
Views: 6088

Re: unthresholded recurrence plots images

Hi All, I want to use CRP for calculating RQA. R = crp (x) gives the threshold matrix. Is there any way to have the unthreshold matrix or save unthreshold RQA image? Regards Sure. As it is specified in the help of this function, the corresponding flag is "distance" (or in short "dis&...
by Norbert
Thu Nov 25, 2021 08:19
Forum: Available Software
Topic: New functions in CRP Toolbox regarding corrections
Replies: 0
Views: 59302

New functions in CRP Toolbox regarding corrections

After long time some new functions (embed, skel_crp, dl) have been included into the Cross Recurrence Plot Toolbox for MATLAB , mainly providing the corrections proposed in Kraemer & Marwan, Phys. Lett. A 383 (2019). DOI:10.1016/j.physleta.2019.125977 . skel_crp is a new function and allows to c...
by Norbert
Thu Nov 25, 2021 08:02
Forum: Applications
Topic: pss function and other methods to find proper radius for CRQA
Replies: 3
Views: 58071

Re: pss function and other methods to find proper radius for CRQA

Yes, for radius I meant recurrence threshold ε. As for the research question i'm interested in analyzing the dynamics between two people performing the same movements at the same time. To this regard if I were interested to just the line of synchronization, inputting in the crqad function a lag = 0...
by Norbert
Wed Oct 27, 2021 21:47
Forum: Quantification
Topic: RR calculation using CRQAD and phasesynchro
Replies: 1
Views: 9032

Re: RR calculation using CRQAD and phasesynchro

Should be the same. I have to check. Perhaps there is another norm selected or the time series was normalised by default. Do you have a short example? I could use it to check the code.
by Norbert
Mon Oct 4, 2021 09:30
Forum: Recurrence Plot Symposium
Topic: 10th Recurrence Plot Symposium in Japan
Replies: 1
Views: 37751

10th Recurrence Plot Symposium in Japan

The 10th international recurrence plot symposium will most likely by organized by the National Institute of Advanced Industrial Science and Technology in Tsukuba, Japan, in August 28-30, 2023. The venue will be in Tsukuba.

More information coming soon at http://symposium.recurrence-plot.tk/
by Norbert
Mon Oct 4, 2021 09:26
Forum: Applications
Topic: pss function and other methods to find proper radius for CRQA
Replies: 3
Views: 58071

Re: pss function and other methods to find proper radius for CRQA

Hi, I guess with "radius" you mean the recurrence threshold ε? There are really many ideas out now to identify the "optimal" recurrence threshold ε. However, it really depends on the research question. If you like to compare two time series with CRP, it might be best to use simpl...
by Norbert
Wed Aug 4, 2021 21:04
Forum: Multivariate Extensions and Spatial Data
Topic: Multivariate RP
Replies: 5
Views: 25562

Re: Multivariate RP

The multivariate RP is nothing else than using the different time series as the different components of the phase space vector. Therefore, there is no difference to the standard approach, as far as I see it.
by Norbert
Wed May 5, 2021 16:22
Forum: Quantification
Topic: Dear sir! help me !About the threshold!!!
Replies: 1
Views: 7029

Re: Dear sir! help me !About the threshold!!!

The threshold selection depends on the research question and the data. If your data has many outliers or behaves like from a non-stationary process, a normalisation and using a threshold in units of the standard deviation might not be the best choice. Then consider the slecetion that preserves a pre...