Search found 175 matches

by Norbert
Tue Apr 15, 2014 06:40
Forum: Available Software
Topic: Commandline Recurrence Plots
Replies: 4
Views: 8577

Re: Commandline Recurrence Plots

New location of the commandline RQA:
http://tocsy.pik-potsdam.de/commandline-rp.php
by Norbert
Tue Apr 15, 2014 06:33
Forum: Installation
Topic: Did not receive toolbox
Replies: 1
Views: 6506

Re: Did not receive toolbox

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...
by Norbert
Fri Feb 28, 2014 15:27
Forum: Available Software
Topic: Fail to download CRC Toolbox
Replies: 8
Views: 11078

Re: Fail to download CRC Toolbox

great that it is now working. thanks for the reply.
by Norbert
Wed Feb 26, 2014 19:39
Forum: Available Software
Topic: Fail to download CRC Toolbox
Replies: 8
Views: 11078

Re: Fail to download CRC Toolbox

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...
by Norbert
Wed Feb 26, 2014 16:59
Forum: Available Software
Topic: Fail to download CRC Toolbox
Replies: 8
Views: 11078

Re: Fail to download CRC Toolbox

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 nothing)? Cou...
by Norbert
Wed Feb 26, 2014 10:17
Forum: Available Software
Topic: Fail to download CRC Toolbox
Replies: 8
Views: 11078

Re: Fail to download CRC Toolbox

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
by Norbert
Wed Feb 19, 2014 21:51
Forum: Quantification
Topic: Computing Laminarity
Replies: 1
Views: 3740

Re: Computing Laminarity

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...
by Norbert
Wed Feb 19, 2014 21:45
Forum: Bugs
Topic: Storing data in variable skips datapoints
Replies: 2
Views: 4452

Re: Storing data in variable skips datapoints

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)
by Norbert
Mon Feb 3, 2014 20:23
Forum: Applications
Topic: joint vs CRP
Replies: 4
Views: 9503

Re: joint vs CRP

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 ...
by Norbert
Tue Jan 7, 2014 08:31
Forum: General Discussion
Topic: CRP toolbox general question regarding Window Size
Replies: 1
Views: 5452

Re: CRP toolbox general question regarding Window Size

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 ...
by Norbert
Mon Dec 16, 2013 19:54
Forum: Quantification
Topic: RQA comparisons
Replies: 12
Views: 20776

Re: RQA comparisons

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...
by Norbert
Sun Dec 15, 2013 20:46
Forum: Quantification
Topic: RQA comparisons
Replies: 12
Views: 20776

Re: RQA comparisons

Hi, no, this is not correct. We have fixed the control parameter a as I wrote and then calculated a time series for this one value of a . For this time series we calculated one recurrence plot and from this recurrence plot the RQA measures. The value of a was not changed here. It is the same. Thus, ...
by Norbert
Tue Dec 10, 2013 08:02
Forum: Quantification
Topic: RQA comparisons
Replies: 12
Views: 20776

Re: RQA comparisons

Hi, the difference between the two papers is that in the first one the parameter a was slightly changed with each iteration step, where in the other paper for each value of a a separate time series was calculated and analysed by RQA. The initial value should not be so important. You could start, e.g...
by Norbert
Wed Nov 20, 2013 12:04
Forum: General Discussion
Topic: original vs normalized data
Replies: 1
Views: 3821

Re: original vs normalized data

I wonder, do we get the same recurrence plots for both original and the normalized series? How about the quantification measures? Are there any references for this? Thank you. As long as you rescale the recurrence threshold you can get exactly the same recurrence plot. Similar issues are explained ...
by Norbert
Wed Nov 20, 2013 12:02
Forum: General Discussion
Topic: k-nearest neighbour networks
Replies: 1
Views: 3864

Re: k-nearest neighbour networks

1) Assuming the embedding dimension is m, i will get m-1 adjacency matrices ( for dimension 2 to m ). I am interesting in computing some network measures like clustering coefficient. Do I compute this measure for each dimension and then average it ? Or how do it take all the dimension into consider...