Search found 175 matches

by Norbert
Mon Nov 16, 2015 10:20
Forum: Available Software
Topic: Commandline Recurrence Plots
Replies: 4
Views: 8577

Re: Commandline Recurrence Plots

1) Is this threshold parameter an absolute value of the radius or a percentage value of the maximum diameter of the phase space? Yes, it is an absolute value. 2) Is there a way to vary the parameter m and t? I mean, instead of using "-m 3 -t 7", … Yes, you can do it. You have to use either num2str ...
by Norbert
Fri Sep 25, 2015 12:33
Forum: Bugs
Topic: Displayed fonts problem
Replies: 1
Views: 3349

Re: Displayed fonts problem

Hello,
cold you please post a screenshot and further details about your operatin system?
Thanks!
Norbert
by Norbert
Sat Aug 22, 2015 11:09
Forum: General Discussion
Topic: Calculating perpendicular RP
Replies: 1
Views: 4409

Re: Calculating perpendicular RP

In this case (tangential motion close to the LOI) you just need to apply the Theiler window. The CRP toolbox has such an option. Just look in the help of the crp and crqa functions.
by Norbert
Tue Jul 7, 2015 21:42
Forum: General Discussion
Topic: Confidence Intervals for RP-measures
Replies: 1
Views: 3517

Re: Confidence Intervals for RP-measures

Hi David, yes, Stefan's solution on the Humboldt university website is different. It relates to this paper: S. Schinkel, N. Marwan, O. Dimigen, J. Kurths: Confidence bounds of recurrence-based complexity measures, Physics Letters A, 373(26), 2245–2250 (2009). DOI:10.1016/j.physleta.2009.04.045 For t...
by Norbert
Tue Jul 7, 2015 21:37
Forum: General Discussion
Topic: correlation using probability of recurrence
Replies: 1
Views: 3500

Re: correlation using probability of recurrence

Hi, your solution looks correct. Perhaps the used time window is too small. You can add another argument that specifies the time window (i.e. the maximal time range that will be considered by this method). If you need the p(tau) separately, you can calculate them by the crqad function: y = crqad(tim...
by Norbert
Tue Jul 7, 2015 21:27
Forum: Quantification
Topic: Sample code to apply a windowing recurrence analysis with CR
Replies: 0
Views: 4026

Sample code to apply a windowing recurrence analysis with CR

I post here a MATLAB coding example that was developed within the hands-on session of the 6th RP symposium in Grenoble. It allows a windowed recurrence analysis with changing parameters for each window. %% Sample code to apply a windowing recurrence analysis with CRP Toolbox for MATLAB % Allows to c...
by Norbert
Tue Jun 23, 2015 15:17
Forum: General Discussion
Topic: Email list
Replies: 0
Views: 4092

Email list

We have created a Google groups based email list: https://groups.google.com/forum/?#!forum/recurrenceanalysis . Feel free to join in order to be updated on everything around recurrence based time series analysis. Alternatively, you can follow new about recurrence plot on Twitter: https://twitter.com...
by Norbert
Tue Jun 23, 2015 15:07
Forum: Recurrence Plot Workshop
Topic: next workshop
Replies: 2
Views: 6423

Re: next workshop

The 2017 RP symposium will probably be in Brazil. Keep in touch to be informed!
Norbert
by Norbert
Wed Mar 18, 2015 07:19
Forum: Recurrence Plot Workshop
Topic: 6th Recurrence Plot Symposium in Grenoble
Replies: 0
Views: 4075

6th Recurrence Plot Symposium in Grenoble

The sixth international recurrence plot symposium will be in Grenoble, France, in June 2015.

More information:
http://symposium.recurrence-plot.tk/
by Norbert
Fri Mar 6, 2015 14:44
Forum: Multivariate Extensions and Spatial Data
Topic: Non-Time series data analysis
Replies: 2
Views: 5065

Re: Non-Time series data analysis

Hello I have no idea what you are really would like to do. But perhaps the ACE algorithm is something what you are looking for? Although it is not related to recurrence plots, it is included in the CRP toolbox for Matlab. Standalone version can be found here: http://tocsy.pik-potsdam.de/ace.php Best...
by Norbert
Thu Dec 11, 2014 07:01
Forum: General Discussion
Topic: JRP between binary and continuous time series
Replies: 2
Views: 5178

Re: JRP between binary and continuous time series

Hi David, thanks for this interesting example that is a quite challenging one, in my opinion. First, you are right to try to use the JRP. However, in my opinion the binary data requires an alternative recurrence criterion. As a start, you can try to do it as you started. The dense region at the bott...
by Norbert
Tue Oct 7, 2014 12:01
Forum: General Discussion
Topic: window size
Replies: 5
Views: 6746

Re: window size

it is in my quite old diploma thesis in the appendix B (pp. 110) – but only in German.
available at http://recurrence-plot.tk/furtherreading.php

i have not further considered this issue but would clearly be worth to do it.
by Norbert
Tue Sep 30, 2014 14:48
Forum: General Discussion
Topic: window size
Replies: 5
Views: 6746

Re: window size

Hello Denise, the results depend on the window size and also on the length of the entire time series, i.e., how many windows you finally will have. This would need some consideration from your side. Regarding the plot and the plateaus: I would not really call them plateaus, but after window size 150...
by Norbert
Mon Sep 29, 2014 10:46
Forum: Comparability
Topic: VRA and RQA software
Replies: 7
Views: 22973

Re: VRA and RQA software

zohaa3492 wrote:How can I derive TREND parameter by using CRP Toolbox?
Please have a look at the FAQ of the CRP Toolbox:
http://tocsy.pik-potsdam.de/CRPtoolbox/ ... html#trend
by Norbert
Wed Sep 3, 2014 18:33
Forum: General Discussion
Topic: Causality
Replies: 1
Views: 3617

Re: Causality

There are different ways for causality tests using recurrence plots. I suggest to look into the rich literature: Y. Zou, M. C. Romano, M. Thiel, N. Marwan, J. Kurths: Inferring Indirect Coupling by Means of Recurrences, International Journal of Bifurcation and Chaos, 21(4), 1099–1111 (2011). DOI: 10...