FI X - File Information - Retrieve file header value(s) by location

PURPOSE

Retrieve particular values from SPIDER or MRC file header by location in the file header and place the values in specified register variables.
Note: This is a legacy operation. It has is usually easier to use: ''FI H'.   Example.

SEE ALSO

FI H	[File Information - Retrieve file Header values by name]
FI A	[File Information - Multiple files]
FI N	[File Information - List and retrieve, No halt if file not found]
ST	[Set values in data file header]

USAGE

.OPERATION: FI X [max],[avg]

[This operation takes a variable number of optional register variables. On completion of the operation, the variable(s) receive the values in header locations specified.]

.FILE INFO. ON FILE: PIC002
[SPIDER or MRC file name.]

If register variables are present on the operation line then SPIDER asks:

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

[Here for a SPIDER file , label location No. 7 (which is FMAX) is placed in register variable: [max] and No. 9 (which is AV) is placed in register variable: [avg].]

NOTES

1. SPIDER file header locations.

2. MRC file header locations.

SUBROUTINES

FILGEN, FILDAT

CALLER

UTIL1