plotevol: Plot Spectrogram

Description

Plot Spectrogram

Usage

plotevol(DEVOL, log = 0, fl = 0, fh = 10, col = col, ylog = FALSE, ygrid
= FALSE, AXE = c(1, 2, 3, 4), CSCALE = FALSE, WUNITS = "Volts", STAMP =
NULL, STYLE = "fft")
plotevol2(DEVOL, log = 0, fl = 0, fh = 10, col = col, ylog = FALSE, ygrid
= FALSE, AXE = c(1, 2, 3, 4), CSCALE = FALSE, WUNITS = "Volts", STAMP =
NULL, STYLE = "fft", add=FALSE, IMAGE=TRUE, WIG=TRUE )
blankevol(DEVOL, log=0,  fl=0, fh=10 , col=col, ylog=FALSE, ygrid=FALSE,
AXE=c(1,2,3,4),
CSCALE=FALSE, WUNITS="Volts", STAMP=NULL, STYLE="fft", WIG=TRUE  )

Arguments

Value

Graphical Side Effects

Details

Plot Spectrogram. Because the fft function returns positive and negative frequencies, ff STYLE="fft" then the image matrix is reduced IMAT = t(DSPEC[1:(numfreqs/2),]) otherwise IMAT = t(DSPEC).

plotevol2 is used to add secondary spectra to ones already plotted, or to manage graphical paramters, or create other plots that match the graphical presentation of the spectrogram (plots of frequency versus time, but not images)

Examples

Run this code

data(CE1)

Xamp = CE1$y

DT = CE1$dt

 tsecs = DT*(length(Xamp)*.02)
    multi = 2
scale.def = 1
  TWOSEC = tsecs*(1/DT)
    
  NS = floor(multi*TWOSEC)
  NOV = floor(multi*(TWOSEC-.2*TWOSEC))

    
    Nfft=4096

    pal = rainbow(100)

    fl  = 0
   fh=1/(2*DT)

   flshow =  .5
   fhshow = 120

   DEV = evolfft(Xamp,DT , Nfft=Nfft, Ns=NS , Nov=NOV,  fl=fl, fh=fh  )

  PE =  plotevol(DEV, log=scale.def, fl=flshow, fh=fhshow,
                 col=pal, ygrid=FALSE, STAMP="HITHERE", STYLE="fft")