CL HE - Classification - Hierarchical clustering, create docfiles

PURPOSE

Creates selection document files for a given threshold.

SEE ALSO

CL CLA	[Classification - Clustering]
CL HC	[Classification - Hierarchical Clustering]
CL HD	[Classification - Hierarchical clustering, calculate classes]

USAGE

.OPERATION: CL HE

.THRESHOLD (0-1): 0.2

.DENDOGRAM DOCUMENT FILE: DND102
[Enter the document file name containing information about classification tree (produced by 'CL HC').]

.ENTER TEMPLATE FOR SELECTION DOC FILE: GRP***
[Enter the template for selection document file names which will contain numbers of objects for every class. Thus, for example, selection document file GRP012 will contain number of images belonging to class 12 at a threshold 0.2.]

NOTES

1. This command uses output from 'CL HC' and works only in conjunction with hierarchical clustering.

2. To calculate averages for the classes, use command AS DC and selection doc files.

3. This command implements the following SPIDER procedure:

    
             ; HCLASS - retrieving of groups on a given level 
             X51=0.42 
             ; # OF OBJECTS IN A GROUP 
             X41=0.0 
             ; # OF GROUPS 
             X42=1.0 
             X55=1.0 
             UD IC,X55,X31,X32 
             HCLAS2 
             X41=X41+1.0 
             SD X41,X31 
             GRPX42 
             DO LB1 I=2,838 
                UD IC,X0,X21,X22 
                HCLAS2 
                IF(X32.LT.X51) GOTO LB2 
                SD X42,X41 
                CLASD 
                X42=X42+1.0 
                X41=1.0 
                SD X41,X21 
                GRPX42 
                IF(X41.EQ.1.0) GOTO LB1 
                LB2 
                X41=X41+1.0 
                SD X41,X21 
                GRPX42 
                X32=X22 
             LB1 
             SD X42,X41 
             CLASD 
             EN 
             

   4. Implemented by P. Penczek.

SUBROUTINES

HELS

CALLER

UTIL1