FI - File Information - place header value(s) in register variable

PURPOSE

Prints out information on specified file. Can optionally retrieve particular locations from the file header and place them in specified real variables or 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]
FR	[Read (sets) a local symbolic parameter (string variable)]
ST	[Set values in image header]

USAGE

.OPERATION: FI

<or>
FI [var23],[var24] <or>
FI x23,x24

.FILE INFO. ON FILE: PIC002
[Prints out FILE INFORMATION for the single file specified. If register variables are present on the operation line then the routine allows the user to retrieve particular locations from the file header and place them in the desired variables or registers. The following question will appear then:

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

[Header location No. 7 (which is FMAX) is placed in first register specified and No. 9 (which is AVD) is placed in the second register specified.

The header 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 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) 
              12  NSAM   = NUMBER OF PIXELS PER LINE 
              14  IANGLE = FLAG INDICATING THAT TILT ANGLES PRESENT 
              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