NAME

Spectra - Calculate spectrum


SYNOPSIS

Spectra < in.h [in= out= j1= j2= j3= d1= phase=] > out.H


INPUT PARAMETERS

n1 - integer
       on output (n1=(nearest power of two)/(2*j1)+1)
n2,n3 - integer
       like Window
esize - integer
       4=default=real input; 8=optional complex input
j1,j2,j3 -integer
        like Window but spectra will be added, not subsampled,
        effectively smoothing the spectra
d1 -real
       on output will be replaced by j1/2*dt
phase -file
       output auxiliary file with phase spectra
mode -char
       mode=all defaults j2=n2 & j3=n3 to reproduce 
       functionality of old Spectrum program (not the default)


DESCRIPTION

Obtain averaged amplitude spectra. Spectrum on 1=axis, smoothing on all axes.


SEE ALSO

the Ftplot manpage


CATEGORY

seis/filter