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FI X - File Information - place header values in registers

(4/7/97)

PURPOSE

Retrieve particular locations from the file header and place them in specified registers.

SEE ALSO

FI [File information - single file information]
FI A [File information - multiple files]
FI N [File information - single file, do not stop if not found]
FI X [File information - place header values in registers]
FR [File read]

USAGE

.OPERATION: FI X23,X24

.FILE INFO. ON FILE: PIC002
[The routine allows the user to retrieve particular locations from the file header and place them in the desired registers. The following question will appear:

ENTER NUMBER(S) OF LABEL LOCATION TO BE RETRIEVED: 7,9

[Label location No. 7 (which is FMAX) is placed in register 23 and No. 9 (which is AVD) is placed in register 24. The label location input is done using subroutine GETNUM. i.e. no parentheses needed in DO loops.]

NOTES

  1. Some locations from the from the file header that can be retrieved;
     
                7  FMAX  = IMAGE MAXIMUM 
                8  FMIN  = IMAGE MINIMUM 
                9  AVD   = IMAGE AVERAGE 
               10  SIG   = STANDARD DEVIATION (SQ. ROOT OF VARIANCE) 
               11  IHIST = FLAG INDICATING THAT HISTOGRAM HAS 
                                  BEEN COMPUTED, AND STORED 
               14  IANGLE= FLAG INDICATING THAT TILT ANGLES STORED 
               15  PHI   = TILT ANGLE 
               16  THETA = TILT ANGLE 
               17  PSI   = TILT ANGLE 
               18  XOFF  = X OFFSET 
               19  YOFF  = Y OFFSET 
               20  ZOFF  = Z OFFSET 
               21  SCALE = SCALE 
    

  2. See SPIDER image file format description for a complete listing of buffer positions.

SUBROUTINES

FILGEN, FILDAT

CALLER

UTIL1

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