FR G - Read (sets) a global string (symbolic) variable

PURPOSE

Associates a file name template or any other alphanumeric string with a string (symbolic) variable. Reads input from current procedure or terminal. 'FR G' differs from 'FR' which receives input from the calling procedure or input stream. The string variable is available globally from all following SPIDER procedures executed during this run.

SEE ALSO

FR	[Read (sets) a local string (symbolic) variable]
FR L	[Read (sets) a local string (symbolic) variable]
FR N	[Read (sets) next global symbolic (string) variable from file]
FR F	[Read (sets) global symbolic (string) variables from a file]
RR	[Read Register variables]
VAR	[Variable Assignment]

USAGE

.OPERATION: FR G

.VARIABLE NAME & ASSOCIATED VALUE: [label]value
[Enter string variable name (surrounded by []'s) and associated alphanumeric string.]

NOTES

1. This operation is useful when writing long procedures as a variable can be initialized to contain a string at the top of a procedure, then the variable e.g. [raw_file] can be used throughout this and following procedures. If the string's value later changes then it only has to be altered at one location in the procedure.

2. Example.
   

   FR G

   [raw_file]nerve{***[iter]}

   DO [iter]=4,6

   FS

   [raw_file]

   ENDDO

   [iter]=16

   CP

   [raw_file]

   [raw_file]_jnk

   EN

   When procedure executes, operation sequence is :

   FS
   nerve004
   FS
   nerve005
   FS
   nerve006
   

   CP
   nerve016
   nerve016_jnk
   

SUBROUTINES

RDPRMC, RDPR, SYMPAR, SETSYMPAR, SUBSYMPAR, PARSESYMPAR

CALLER

DRIV1