The help_TimeScalePlotMatrix
node creates a matrix representing
the scale-space of the original 1D profile. Note that since the
fast wavelet transform (FWT) makes use of dyadic downsampling,
each scale vector going from the highest to the lowest resolution will
at each step half in size compare to the previous one. This ensures
the total number of wavelet coefficients is the same as the total
number of elements in the original data vector, i.e. we have a
non-redundant transform. The matrix created by this node can be
visualised with the ``image'' plot type, see Figure 1.
These are node arguments:
W: matrix which contains the wavelet coefficient vector for each profile (e.g. infrared spectrum) in each row
row: This is an integer indicating which row in the W coefficient matrix will be visualised
Xh: which is a matrix where each row has been reconstructed according to the input wavelet coefficient matrix W
SEE ALSO: WaveletTransform
which produces W coefficient
matrices this routine can visualise.
Source: This node is using tools from the WavelLab toolbox which
can be downloaded from http://www-stat.stanford.edu/~wavelab/
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Bjørn Kåre Alsberg 2006-04-06