functions in std.i - j


    jc, file, ncyc  

jump to the record of FILE nearest the specified NCYC.  
Interpreted function, defined at i0/std.i   line 3143  

SEE ALSO: jt,   _jc,   edit_times,   show,   jr  


    jr, file, i  
 or _jr(file, i)  

Jump to a particular record number I (from 1 to n_records) in a  
binary file FILE.  The function returns 1 if such a record exists,  
0 if there is no such record.  In the latter case, no action is  
taken; the program halts with an error only if jr was invoked  
as a subroutine.  Record numbering wraps like array indices; use  
jr, file, 0  to jump to the last record, -1 to next to last, etc.  
Interpreted function, defined at i0/std.i   line 3166  

SEE ALSO: jt,   jc,   edit_times,   show  


    jt, time  
 or jt, file, time  
 or jt, file  
 or jt, file, -  

  jump to the record nearest the specified TIME.  If no FILE is  
  specified, the current record of all open binary files containing  
  records is shifted.  
  If both FILE and TIME are specified and jt is called as a function,  
  it returns the actual time of the new current record.  
N.B.: "jt, file" and "jt, file, -" are obsolete.  Use the jr function to  
  step through a file one record at a time.  
  If only the FILE is specified, increment the current record of that  
  FILE by one.  If the TIME argument is - (the pseudo-index range  
  function), decrement the current record of FILE by one.  
  If the current record is the last, "jt, file" unsets the current record  
  so that record variables will be inaccessible until another jt or jc.  
  The same thing happens with "jt, file, -" if the current record was the  
  If only FILE is specified, jt returns 1 if there is a new current  
  record, 0 if the call resulted in no current record.  Thus "jt(file)"  
  and "jt(file,-)" may be used as the condition in a while loop to step  
  through every record in a file:  
     file= openb("example.pdb");  
     do {  
       restore, file, interesting_record_variables;  
     } while (jt(file));  
  Interpreted function, defined at i0/std.i   line 3106  

SEE ALSO: jc,   _jt,   edit_times,   show,   jr