Basic wavelet analysis of multivariate time series with a visualisation and parametrisation using graph theory.


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Documentation for package `brainwaver' version 1.4

This package computes the correlation matrix for each scale of a wavelet decomposition, namely the one performed by the R package waveslim (Whitcher, 2000). An hypothesis test is applied to each entry of one matrix in order to construct an adjacency matrix of a graph. The graph obtained is finally analysed using the small-world theory (Watts and Strogatz, 1998) and using the computation of efficiency (Latora, 2001), tested using simulated attacks. The brainwaver project is complementary to the camba project for brain-data preprocessing.

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brain Time series obtained by an fMRI experiement on the brain
choose.thresh.nbedges Threshold associated to a given number of edges.
compute.FDR False Discovery Rate computation
const.adj.list Computation of the list of adjacency matrices
const.adj.mat Computation of the adjacency matrix
const.cor.list Computation of the list of correlation matrices
const.var.list Computation of the list of variance vectors
cost.evaluator Graph efficiency
equadist.rand.sw Small-world parameters for a simulated graph given its degree distribution
fitting Fitting laws with maximum likelihood
global.cost Graph efficiency
global.efficiency Graph efficiency
local.efficiency Graph efficiency
node.attack Attack of graphs
p.value.compute Computation of the p-value for a given hypotheses test
rand.eff Efficiency for simulated graphs
rand.sw Small-world parameters for simulated random graphs
random.attack Attack of graphs
read.convert_1_2 Conversion of already edited objects from version 1 to 2
read.cor.txt Exportation and importation of internal objects.
read.var.txt Exportation and importation internal objects.
reg.eff Efficiency for simulated graphs
reg.sw Small-world parameters for a lattice graph
save.cor.txt Exportation and importation of internal objects.
save.var.txt Exportation and importation internal objects.
sim.equadist Simulation of graphs
sim.rand Simulation of graphs
sim.reg Simulation of graphs
small.world Computation of some quantitive parameters given in the framework of the small-world graph theory.
targeted.attack Attack of graphs
wave.trans Computation of the wavelet transform
young Time series obtained by an fMRI experiement on the brain