| 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] |
.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 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.
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