Segment

NAME

Segment - spectrum segmentation
SYNOPSIS

Segment expr expr expr expr ( 0 | 1 ) { expr }
DESCRIPTION

Do a segmentation of all currently selected spectra. The Noise command must be executed before using this command.

The first argument gives the level for segmentation, as factor of the noise level. This is normally around 1.0.

The next argument gives a minimal level (also as factor of the noise level) for at least one of the points within a region. This is typically taken around 1.5 for high quality spectra, somewhat higher for spectra that are less well processed.

The next two arguments select which/if the diagonal should be excluded. This is done by giving the two domains between which the diagonal should be excluded, this will normally be 0 and 1. If no diagonal exclusion is desired, 0 should be given for both domains.

The next argument selects whether regions connected to the border of the spectrum should be excluded. In many spectra, the first/last rows are not properly baseline corrected, in this case this option should be selected.

The remaining arguments give a minimal size (in data points) for each direction.

The program handles the created regions as spectra. By default they are drawn as contours in 2D, and are invisible for more dimensions. This can be changed with StyleSpec.

EXAMPLE

Segment 1.0 1.5 0 1 1 3 2
SEE ALSO

OpenBruker, OpenEasy, SelectSpec, Noise, StyleSpec

DATE

961004


Reto Koradi, kor@mol.biol.ethz.ch