FI X - File Information - place header values in registers

PURPOSE

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

SEE ALSO

FI	[File Information - place header value(s) in register variable]
FI A	[File Information - Multiple files]
FI N	[File Information - Do not halt if file not found]
FI X	[File Information - place header values in registers]
FR	[Read (sets) a local symbolic parameter (string variable)]
ST	[Set values in image header]

USAGE

.OPERATION: FI [fmax],[avd]

.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 LOCATIONS TO BE RETRIEVED: 7,9

[Label location No. 7 (which is FMAX) is placed in register [fmax] and No. 9 (which is AVD) is placed in register variable: [avd]. 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;

    
               1  NSLICE = Number of slices (planes) in volume 
                           (= 1  for an image) 
               2  NROW   = Number of rows per slice 
               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 
              12  NSAM   = Number of pixels per line 
              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 
              26  MAXIM  = HIGHEST IMAGE NUMBER IN USE 
   

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

SUBROUTINES

FILGEN, FILDAT

CALLER

UTIL1