FR - Read (sets) a local string variable

PURPOSE

Associates a file name template or any other alphanumeric string with a string (symbolic) variable. This operation should only be called from inside a procedure. The string variable is specified inside the procedure. The associated value is read from current input stream which may be either an interactive SPIDER run or a higher level procedure.

SEE ALSO

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

USAGE

.OPERATION: FR

[Operation given in a SPIDER procedure.]

.PROMPT & VARIABLE NAME: ?MYPROMPT? [name]
[Enter prompt string to be printed when procedure is called from an interactive session and name for this variable.]

[Upon procedure execution, prompt string is printed on terminal or in SPIDER results file:]

.MYPROMPT: PIC{***[num]}
[Enter value to be associated with this variable. Any alphanumeric string such as a filename is allowed. If the value contains another variable or a register, then these components are evaluated in the procedure where they are specified (before being passed into the caller).]

NOTES

1. Example.
   If the following lines are contained inside a SPIDER procedure:

   FR

   ?NERVE FILE PREFIX? [temp]

    

   DO I=4,6

   FS

   [temp]{***I}

   ENDDO

    

   CP

   [temp]004

   [temp]_jnk

   EN

   When procedure is invoked from an interactive SPIDER session, the ?NERVE FILE PREFIX? prompt appears and the user has responded with nerve:

   ?NERVE FILE PREFIX? [nerve]

   When do-loop executes, operation sequence is :

   FS
   nerve004
   FS
   nerve005
   FS
   nerve006

   Following do-loop execution, operation sequence is :

   CP
   nerve004
   nerve_jnk
   

SUBROUTINES

DRIV1, SYMPAR, RDPRMC

CALLER

DRIV1