RECURRENCE PLOTS

There is nothing to be implemented further. If you have only a binary time series, you just need to ensure that your threshold is smaller than 1. This will give the same results as using the identity relationship (i.e., threshold = 0).

Yes, this is possible. This is also called "recurrence on a nominal scale" or "symbolic recurrences". There are several studies already using this approach. The difference to the standard recurrence approach is that instead of a neighbourhood of some size ε a recurrence can now b...

Thanks for your careful checking of the code. You are probably right! In the original version, the embedding used a fixed delay of tau = 1. Therefore, the considered line is a relict of these days. But as you said, it should be corrected to consider the delay. I will check the code and improve it wi...

new location for the CRP plugin:
http://tocsy.pik-potsdam.de/CRPtoolbox/ ... plugin.php

New location of the commandline RQA:
http://tocsy.pik-potsdam.de/commandline-rp.php

I'm sorry but we provide the software for free and we have to manage it aside our daily work. If we would ask for money then I could understand that potential users might be unsatisfied with the delay. But not when we provide it for free. Moreover, in the email you have received after your request t...

great that it is now working. thanks for the reply.

I have just checked on a windows 8.1 system using Chrome and Firefox and it was working without any problems. As far as I understand you filled out all fields but have not been able to select the research field? Which entry have you tried to select? Did you try also other selections? You are the fir...

OK, I found an entry in the error log. There was a failure during registration. A database entry was not created. After your registration, have you seen a screen with a statement something like "registration success, access data will be send" or did you see an error message (or perhaps not...

Hello,

I'm sorry to read that you have not been able to download. But please let me know when did you registered? I can check in the database whether there have been some issues. We can surely help you.

Best
Norbert

There are different ways, depending whether the time series are in files or are already in your Matlab workspace. Let's start simple and assume your time series are the columns of an array: x = [x1, x2, x3, … x10]; size(x) gives something like N, 10, where N is the length of your time series. Now yo...

Hi,

no it is not a bug. You have obviously used a window step of 2, therefore only every 2nd RQA value is calculated. To plot it you have to use then

R = crqa(x,m,t,e,w,ws);
plot(R(1:ws:end,5))

where ws is the window step, in your case 2
(just as an example)

as explained in the help of the jrp function, it is working only for two time series. but you can simply create your own JRP by multiplying separate single RPs: x1=rand(200,1); x2=rand(200,1); x3=rand(200,1); x4=rand(200,1); X1=crp(x1); X2=crp(x2); X3=crp(x3); X4=crp(x4); J=X1.*X2.*X3.*X4; (in this ...

regarding the window size in the GUI, the RQA measures calculated from the software (LAM, DET, ENTR, etc.) end before the Raw, input, Data ends, i.e. are shorter than the Raw Data. That, I explain to myself by thinking that, assuming our window size is 250, in order to calculate the first value of ...

Increasing a with each iteration step causes abrupt bifurcations and at partly unpredictable time points. You can see this by comparing the bifurcation diagrams derived from both approaches. But usually we are more interested in the more subtle transitions, therefore, calculating a time series for f...