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2013 Apr 19
1
How to select the scale parameter for Gabor transform (Rwave)?
...e requirements above. To make sure sigma=200 works in practice, I computed the Gabor transform of two sinusoids separated by 0.04 Hz plus two spikes separated by 30 points using the code below. I obtained an excellent frequency resolution but a disastrous temporal resolution http://sccn.ucsd.edu/~rapela/scaleSelectionProblem/gtResultSigma200.jpg. To obtain decent frequency and temporal resolutions I used sigma=10 http://sccn.ucsd.edu/~rapela/scaleSelectionProblem/gtResultSigma10.jpg. fromTime <- 0 toTime <- 250 by <- 1 ts <- seq(from=fromTime, to=toTime) f1 <- 0...
2010 Mar 25
4
3 levelplots and 1 colorbar
...ey=TRUE) print(p, position=c(2/3,0,3/3,1), more=FALSE) ### Two levelplots ### frame <- matrix(rnorm(16*48), nrow=16) p <-levelplot(frame, colorkey=FALSE) plot(p, position=c(0,0,1/2,1), more=TRUE) p <-levelplot(frame, colorkey=TRUE) plot(p, position=c(1/2,0,1,1), more=FALSE) -- Joaquin Rapela PhD Student, Electrical Engineering University of Southern California 3641 Watt Way, Los Angeles, CA 90089-2520 tel/fax: (213) 821-2070 http://www-scf.usc.edu/~rapela ---------------------------------- Player King: And hitherto doth love on fortune tend:...
2006 Feb 21
1
wireframe, axis label-axis separation, xlab rotation
...2. Again, using wireframe, I rotate the whole plot using the screen parameter. However, the x- and y-axis labels (xlab and ylab) remain horizontal. How could I rotate them? Thanks in advance, Joaquin PS: my apologizes if these questions are too basic. I am new to R and to Trellis. -- Joaquin Rapela PhD Student, Electrical Engineering University of Southern California Hedco Neuroscience Building 3641 Watt Way Los Angeles, CA 90089-2520 tel/fax: (213) 821-2070 http://www-scf.usc.edu/~rapela ---------------------------------- "This is the origin of their (the Aborigines') belief in the...