RQA

Specific discussion regarding applications.

RQA

After I create recurrence matrix using "crp" function and I get a recurrence matrix, can I calculate RQA from this matrix?

I read your manual but it seems all function needed "time series" as input. Sivarit Sultornsanee (Tony)

Network/Nano Science and Engineering Laboratory (NSE Lab)
360 Huntington Ave., Room 320 SN, Boston, MA 02038, USA
E-mail: SULTORNSANEE.S@HUSKY.NEU.EDU sultornsanee
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Posts: 29
Joined: Tue Oct 12, 2010 21:05
Location: Network/Nano Science and Engineering Laboratory, Northeastern University, Boston, USA

Re: RQA

yes, you can do it. for example:

Code: Select all
`% create recurrence plotX = crp(timeseries,'silent');% get distributions of line lengths% (actually you should apply here the Theiler window before, but I omit it for simplification)[m l] = dl(X); % l is a list of all line lengths of diagonal lines[m v] = tt(X); % v is a list of all line lengths of vertical lines% recurrence ratemean(X(:))% determinismsum(l(l>=lmin))/sum(X(:)) % where lmin is the minimal diagonal line length, e.g. lmin=2% mean diagonal line lengthmean(l(l>=lmin))% maximal diagonal line lengthmax(l(l>=lmin))% entropyhistL=hist(l,1:length(X));entropy(histL(:));`

for the vertical line based measures (laminarity, trapping time etc.) just use vector v instead of l

best
norbert Norbert
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Joined: Wed Jan 4, 2006 11:03
Location: Potsdam Institute for Climate Impact Research, Germany

Re: RQA

Thank you very much ... I will try to test your codes. Sivarit Sultornsanee (Tony)

Network/Nano Science and Engineering Laboratory (NSE Lab)
360 Huntington Ave., Room 320 SN, Boston, MA 02038, USA
E-mail: SULTORNSANEE.S@HUSKY.NEU.EDU sultornsanee
Senior

Posts: 29
Joined: Tue Oct 12, 2010 21:05
Location: Network/Nano Science and Engineering Laboratory, Northeastern University, Boston, USA

Re: RQA

After I create recurrence matrix using "crp" function and I get a recurrence matrix, can I calculate RQA from this matrix?
Parri-Dee
Parri-Dee
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