CRP Toolbox Reference |
crqad_bigPurposeComputes and plots the diagonalwise CRQA measures of long data series.Syntax
crqad_big(x,y) y=crqad_big(x,y,m,t,e,w) y=crqad_big(x,y,m,t,e,[],'param1','param2',...) DescriptionRecurrence quantification analysis of diagonals in the cross recurrence plot of the vectors x and y as well as x and -y for the diagonals within the range [-w,w] around the main diagonal. The output is a structure (see below). The input vectors can be multi-column vectors, where each column will be used as a component of the phase-space vector. However, if the first column is monotonically increasing, it will be used as an time scale for plotting. ParametersDimension m, delay t, the size of neighbourhood e and the range size w are the first five numbers after the data series; if w=[] then the whole plot will be calculated. Further parameters can be used to switch between various methods of finding the neighbours of the phasespace trajectory, to suppress the normalization of the data and to suppress the GUI (useful in order to use this programme by other programmes).
Parameters not needed to specify. LimitationsIn contrast to crqad, only maximum, Euclidean and minimum norm are available. Examples
b=sin(0:.1:800)+randn(1,8001); crqad_big(a,b,3,15,.1,50,'euc') RemarksA GUI for this task is under development. See AlsoReferencesMarwan, N., Kurths, J.: Nonlinear analysis of bivariate data with cross recurrence plots, Phys. Lett. A, 302, 2002. |
crqad | dl |