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 BACKPROD 
 
 

Replaces the 2D buffer by the product of the current 2D buffer by 
the transpose of it

see also : DIAGONALIZE

 
 BCOLOR 
 
 

BCOLOR index window
Defines the current background color used for display. The chosen 
color remains until the next
BCOLOR command.
index is :	1:white  2:red  3:yellow  4:green
		5:cian  6:blue  7:purple  8:black
Window is :   1:1D 2:disp 3:contour 4:3D

see also : CCOLOR CDISP2D COLOR DISP1D DISP2D DISP3D SCOLOR

 
 BCORR 
 
 

	BCORR A { R {n}  list_of_points 0  }
Computes and applies a base-line correction to the current data set.
A   describe the algorithm used:
    1 is linear correction
    2 is cubic spline correction.
    3 is polynomial (and related) correction

o If A is 1 or 2 :

 R   is the radius around which each pivot point is averaged.

 n in 2D is either f1 or f2 (dimension in which correction is 
applied).

 list_of_points is then the list of the pivot points used for the 
base-line correction. The list finishes by 0. The content of th 
point stack is used for prompting.
Linear correction can use 1 or more pivot points. 1 point 
corresponds to correction of a continuous level. Spline corrections 
needs at least 3 points.
In any case maximum is 100 pivot points.

o If A is 3 : 
This method uses a correction by estimation of the baseline and 
subtraction. Words in uppercase are commands.
The four steps are :
	* Initial smooth of data : SMOOTH1
	* First segmentation (detection of signal) : SEGM1
	* Second segmentation (Polynomial approximation
	  may be done on several areas) : SEGM2
	* Approximation (the estimated baseline is an approximation
	  of data points that are not signal) : APPROX
If you do not know how to use these corrections the next three 
commands should help you :
	* BCORRP : Will prompt you for the related parameters, along with 
the name of the command..
	* BCORRP? : the current choices are listed.
	* BCORRP0 : the default set up is restored.
	* BCORRP1 : another set up is activated

Polynomial correction is described by a set of related external 
contexts :
BLCW, BLCITER, BLOCBASE, BCORRP, BCORRP?, BCORRP0, BCORRP1, SMOOTH1, 
WINMA, LEVELHYSTE, SEGM1, BLCU, BLCV, SDS, SDB, SCS, SCB, DCFACTOR, 
DCITER, MORPHOB,  MORPHOS, DCALGO, DCDISTANCE, SEGM2, WINDOW, 
WINSEGM2, LEVELSEGM2, APPROX, WINMA2, ITERM2, DEGRE, WINLIN.

see also : APPROX BCORRP BCORRP0 BCORRP1 BCORRP? BLCITER BLCU BLCV BLCW BLOCBASE DCALGO DCDISTANCE DCFACTOR DCITER LEVELHYSTE LEVELSEGM2 MEDIAN MORPHOB MORPHOS point SEGM1 SEGM2 SMOOTH SMOOTH1 WINDOW

 
 BCORRP 
 
 

a step by step command to choose a set up for the BCORR 3 module

see also : BCORR BCORRP?

 
 BCORRP0 
 
 

Restores the initial configuration with a polynomial approximation 
for the BCORR 3 module

see also : BCORR BCORRP BCORRP1 BCORRP?

 
 BCORRP1 
 
 

Enables a configuration with a dynamic clusters segmentation and a 
moving average approximation for the BCORR 3 module

see also : BCORR BCORRP BCORRP0 BCORRP?

 
 BCORRP? 
 
 

lists the current configuration for the BCORR 3 module.

see also : BCORR BCORRP0 BCORRP1 BCORRP?

 
 BETA 
 
 

beta b
This context is the angle along the OY axis by which the cube is 
rotated during a 3D display with the DISP3D/REF3D set of commands

see also : ALPHA DISP3D GAMA

 
 big 
 
 

 obsolete, for compatibility
 big was removed in Gifa since version 4_09alpha

 
 BLCITER 
 
 

to be used with BCORR 3
The maximum number of iterations for the whole process

see also : BCORR BCORRP?

 
 BLCU 
 
 

blcu real_value
internal value used by the BCORR 3 algorithm

see also : BCORR BCORRP?

 
 BLCV 
 
 

blcv real_value
internal value used by the BCORR 3 algorithm

see also : BCORR BCORRP?

 
 BLCW 
 
 

To be used with BCORR 3
When the RMS of the correction is lower than BLCW times the RMS of 
the data, the correction is finished

see also : BCORR BCORRP?

 
 BLOCBASE 
 
 

to be used with BCORR 3
All parameters in point unit are scaled in the ratio of the data set 
size to this parameter.

see also : BCORR BCORRP?

 
 bug_report 
 
 

 for interactive bug report

 
 build2d 
 
 

 build2d file_name
 builds a 2d from a set of 1D, the name of which are found in file_name
 one entry per line

 

see also : build3d READ

 
 build3d 
 
 

 build3d file_name
 builds a 3d from a set of 2D, the name of which are found in file_name
 one entry per line

 

see also : build2d READ

 
 BURG 
 
 

BURG size
Will perform an in-place forward linear prediction, by using the 
Burg method. The size of the final data-set is size. This command is 
equivalent to the sequence :
DT->AR AR->DT 1 size
but is computed on-place, and can thus be used on a full 2D or 3D 
spectrum.

see also : AR->DT AR->SP burg2d burg3d burg_rev DT->AR ORDER svd_rev

 
 burg2d 
 
 

 burg2d axis new_size

 axis is F1 or F2,
 extend the FID up to new_size, using burg method

 

see also : BURG burg3d

 
 burg3d 
 
 

 burg3d axis new_size

 axis is F1 F2 or F3
 extend the FID up to new_size, using burg method

 

see also : BURG burg2d

 
 burg_rev 
 
 

 burg_rev n_of_point

 reconstruct the missing n_of_point first data points
 using the burg method
 changes order to n_of_point*2

 

see also : AR->DT BURG svd_rev

 
 button.g 
 
 

 set-up the basic GUI
 by loading the default menus
 
 

see also : startup.g

 
 BUTTONBOX 
 
 

BUTTONBOX menu_name [ button_name gifa_command  | separator ] (n 
times) *
Permits to construct a new menu in the menu_bar (will create one if 
none is available). This menu will appear as menu_name  in the 
menu_bar. When menu_name  is clicked by the user, a button box will 
appear, with as many entry as item in the list of commands. Each 
entry in the list is defined as a couple of word, the first one 
being the name of the button in the box, the second one being the 
gifa command to be executed if the button is clicked. The command 
will be executed exactly as if the user had typed it as the prompt 
level, thus the command can be a simple command, several commands on 
a line, of a macro name. However the WHILE, FOR, IF .. THEN, GOTO 
commands are not available; the IF .. any_command syntaxe is 
available. If a parameter is missing for the command, the user will 
be prompted in the text window.
The special entry separator  is not associated to a command, but 
permits to enter a separator in the menu box.
The list is terminated with a star.

see also : CLOSEBUTTON DIALOGBOX FORMBOX MACRO