BUUHWE.plot: Graphical representation of the Bottom Up Unbalanced Haar...

In Bagidis: BAses GIving DIStances

Description

Function for graphical representation of the Bottom Up Unbalanced Haar Wavelet Expansion of a series, as obtained from function BUUHWE.

Usage

BUUHWE.plot(BUUHWE.out, row.max = length(BUUHWE.out$series), 
French = FALSE, Color = TRUE)

Arguments

BUUHWE.out	output of function BUUHWE.
row.max	integer. Number of basis vectors to be represented. By default, all vectors are shown.
French	logical. Should labels be written in french? (default=english)
Color	logical. Should the representation be in color (alternative: black and white)? (default = color)

Details

See References below, in particular Timmermans (2012), Chapter 1, or Timmermans and von Sachs (2010).

Value

This function is invoked for its side effect which is to produce a graphical representation of the expansion of a series in its unbalanced Haar wavelet basis. The series is represented on the top of the graph, with the time axis at the bottom of the main figure. This main figure is the representation of the Unbalanced Haar basis, row by row, with rank k=0 (constant vector) on the top. Vectors are expressed as a function of time (horizontaly) and the height of that function is given by the blue to red color scale (if Color = TRUE) or relatively to a zero level, that is indicated by a dotted horizontal line for each rank. Vertically, the detail coefficients are represented rank by rank at the same level as the corresponding basis vectors. This is the expansion of the series in its associated Unbalanced Haar basis, starting from rang k= 0 on the top of the gaph - wich is represented missing for graphical purpose and continuing downwards with rang k increasing. If you sum those detail coefficients times their associated basis vectors, you get back the initial series.

Note

The equivalent of BUUHWE.plot for images is BUUHWE_2D.plot. Another way to represent the BUUHWE transform of a series is through function BD.plot.

Author(s)

Catherine Timmermans, Institute of Statistics, Biostatistics and Actuarial Sciences, UCLouvain, Belgium.

Contact: [e-mail]

References

The main references are

• Timmermans C., 2012, Bases Giving Distances. A new paradigm for investigating functional data with applications for spectroscopy. PhD thesis, Universite catholique de Louvain. http://hdl.handle.net/2078.1/112451

• Timmermans C. and von Sachs R., 2015, A novel semi-distance for investigating dissimilarities of curves with sharp local patterns, Journal of Statistical Planning and Inference, 160, 35-50. http://hdl.handle.net/2078.1/154928

• Fryzlewicz P. and Timmermans C., 2015, SHAH: Shape Adaptive Haar wavelets for image processing. Journal of Computational and Graphical Statistics. (accepted - published online 27 May 2015) http://stats.lse.ac.uk/fryzlewicz/shah/shah.pdf

• Timmermans C., Delsol L. and von Sachs R., 2013, Using BAGIDIS in nonparametric functional data analysis: predicting from curves with sharp local features, Journal of Multivariate Analysis, 115, p. 421-444. http://hdl.handle.net/2078.1/118369

Other references include

• Girardi M. and Sweldens W., 1997, A new class of unbalanced Haar wavelets that form an unconditional basis for Lp on general measure spaces, J. Fourier Anal. Appl. 3, 457-474

• Fryzlewicz P., 2007, Unbalanced Haar Technique for Non Parametric Function Estimation, Journal of the American Statistical Association, 102, 1318-1327.

• Timmermans C., von Sachs, R. , 2010, BAGIDIS, a new method for statistical analysis of differences between curves with sharp patterns (ISBA Discussion Paper 2010/30). Url : http://hdl.handle.net/2078.1/91090

• Timmermans, C. , Fryzlewicz, P., 2012, SHAH: Shape-Adaptive Haar Wavelet Transform For Images With Application To Classification (ISBA Discussion Paper 2012/15). Url: http://hdl.handle.net/2078.1/110529

The function BUUHWE_2D in this package is similar to the function uh.bu.2d (copyrighted Fryzlewicz 2014) in the package "shah_code", available on the webpage of Piotr Fryzlewicz: http://stats.lse.ac.uk/fryzlewicz/shah/shah_code.R , which accompanies the paper Fryzlewicz and Timmermans (2015).

See Also

BUUHWE, BD.plot,BUUHWE_2D.plot

Examples

x = c(0,0,1,0,0, 3, 5, 0, 0)
BUUHWE.plot(BUUHWE(x))
BUUHWE.plot(BUUHWE(x), Color= FALSE)     

Bagidis documentation built on May 29, 2017, noon