cfamily {Rwave} | R Documentation |
Ridge Chaining Procedure
Description
Chains the ridge estimates produced by the function crc
.
Usage
cfamily(ccridge, bstep=1, nbchain=100, ptile=0.05)
Arguments
ccridge |
unchained ridge set as the output of the function |
bstep |
maximal length for a gap in a ridge. |
nbchain |
maximal number of chains produced by the function. |
ptile |
relative threshold for the ridges. |
Details
crc
returns a measure in time-frequency (or time-scale)
space. cfamily
turns it into a series of one-dimensional
objects (ridges). The measure is first thresholded, with a relative
threshold value set to the input parameter ptile. During the chaining
procedure, gaps within a given ridge are allowed and filled in. The
maximal length of such gaps is the input parameter bstep.
Value
Returns the results of the chaining algorithm
ordered map |
image containing the ridges (displayed with different colors) |
chain |
2D array containing the chained ridges, according to the chain data
structure |
nbchain |
number of chains produced by the algorithm |
References
See discussion in text of “Practical Time-Frequency Analysis”.
See Also
crc
for the ridge estimation, and crcrec
,
gcrcrec
and scrcrec
for corresponding
reconstruction functions.
Examples
## Not run:
data(HOWAREYOU)
plot.ts(HOWAREYOU)
cgtHOWAREYOU <- cgt(HOWAREYOU,70,0.01,100)
clHOWAREYOU <- crc(Mod(cgtHOWAREYOU),nbclimb=1000)
cfHOWAREYOU <- cfamily(clHOWAREYOU,ptile=0.001)
image(cfHOWAREYOU$ordered > 0)
## End(Not run)