sfattr (2.0-git)
index
system/main/attr.c
Documentation
Display dataset attributes.

 
Synopsis
        sfattr < in.rsf lval=2 want=

Sample output from "sfspike n1=100 | sfbandpass fhi=60 | sfattr"
*******************************************
rms = 0.992354
mean = 0.987576
2-norm = 9.92354
variance = 0.00955481
std dev = 0.0977487
max = 1.12735 at 97
min = 0.151392 at 100
nonzero samples = 100
total samples = 100
*******************************************

rms = sqrt[ sum(data^2) / n ]
mean = sum(data) / n
norm = sum(abs(data)^lval)^(1/lval)
variance = [ sum(data^2) - n*mean^2 ] / [ n-1 ]
standard deviation = sqrt [ variance ]

 
Parameters
       
 
int lval=2
norm option, lval is a non-negative integer, computes the vector lval-norm
 
string want=
'all'(default), 'rms', 'mean', 'norm', 'var',
'std', 'max', 'min', 'nonzero', 'samples', 'short'
want= 'rms' displays the root mean square
want= 'norm' displays the square norm, otherwise specified by lval.
want= 'var' displays the variance
want= 'std' displays the standard deviation
want= 'nonzero' displays number of nonzero samples
want= 'samples' displays total number of samples
want= 'short' displays a short one-line version

 
Used In
       

 
GEE
        mda/elita
mda/morgan

 
RSF
        tutorials/attr

 
SEP
        geostat/miss