RQA

Specific discussion regarding applications.
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sultornsanee
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RQA

Post by sultornsanee »

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

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Norbert
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Re: RQA

Post by Norbert »

yes, you can do it. for example:

Code: Select all

% create recurrence plot
X = 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 rate
mean(X(:))

% determinism
sum(l(l>=lmin))/sum(X(:)) % where lmin is the minimal diagonal line length, e.g. lmin=2

% mean diagonal line length
mean(l(l>=lmin))

% maximal diagonal line length
max(l(l>=lmin))

% entropy
histL=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

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sultornsanee
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Re: RQA

Post by sultornsanee »

Thank you very much ... I will try to test your codes. :D
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

Parri-Dee
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Re: RQA

Post by Parri-Dee »

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

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