RSEIS (version 2.1-6)

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")

Arguments

DEVOL

spectrogram structure

log

scale by logarithm

fl

low frequency

fh

high frequency

col

color palette

ylog

scale Y-axis by log

ygrid

logical, TRUE=add grid

AXE

sides to add axis

CSCALE

logical

WUNITS

character string for units

STAMP

character string for identification

STYLE

Plotting style. Default, "fft"=plot half the spectrum image , else plot whole spectrum

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).

See Also

evolfft

Examples

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")