List of all KUIP System Functions.  

          *** KUIP System Functions ***

   The function name (and arguments) is literally replaced, at run-time, by 
   its current value.  At present, the following functions are available:  

    $DATE  .......................  Current date in format DD/MM/YY
    $TIME  .......................  Current time in format HH.MM.SS
    $CPTIME  .....................  CP time elapsed since last call (in sec)
    $RTIME  ......................  Real time elapsed since last call (in sec)
    $VDIM(VNAME,IDIM)  ...........  Physical length of vector VNAME
                                    on dimension IDIM (1..3)
    $VLEN(VNAME,IDIM)  ...........  As above, but for the logical length
                                    (i.e. stripping trailing zeroes)
    $NUMVEC  .....................  Current number of vectors
    $VEXIST(VNAME)  ..............  Index of vector VNAME
                                    (1..$NUMVEC or 0 if VNAME does not exist)
    $SUBSTRING(STRING,IX,NCH)  ...  STRING(IX:IX+NCH-1)
    $UPPER(STRING)  ..............  STRING changed to upper case
    $LOWER(STRING)  ..............  STRING changed to lower case
    $LEN(STRING)  ................  Length of STRING
    $INDEX(STR1,STR2)  ...........  Position of first occurrence of STR2 in 
   STR1
    $WORDS(STRING,SEP)  ..........  Number of words separated by SEP
    $WORD(STRING,K,N,SEP)  .......  Extract N words starting at word K
    $QUOTE(STRING)  ..............  Add quotes around STRING
    $UNQUOTE(STRING)  ............  Remove quotes around STRING
    $EXEC('macro args')  .........  EXITM value of EXEC call
    $DEFINED('var_name')  ........  List of defined macro variables
    $EVAL(Expression)  ...........  Result of the Expression computed by KUIP
    $SIGMA(Expression)  ..........  Result of the Expression computed by SIGMA
    $RSIGMA(Expression) ..........  As above but a decimal point is added to
                                    integer results
    $FORMAT(number,format)  ......  Format a number according to a Fortran
                                    format string, e.g.
                                    $FORMAT(1.5,F5.2) ==> ' 1.50'
                                    $FORMAT(123,I5.5) ==> '00123'
    $ARGS  .......................  Command line at program invocation
    $KEYNUM  .....................  Address of latest clicked key in style GP
    $KEYVAL  .....................  Value of latest clicked key in style GP
    $LAST  .......................  Latest command line executed
    $ANUM  .......................  Number of aliases
    $ANAM(I)  ....................  Name of I-th alias
    $AVAL(I)  ....................  Value of I-th alias
    $STYLE  ......................  Current style as defined by SET/STYLE
    $OS  .........................  Operating system name, e.g. UNIX or VMS
    $MACHINE  ....................  Hardware or Unix brand, e.g. VAX or HPUX
    $PID  ........................  Process ID
    $IQUEST(I)  ..................  Value of IQUEST(I) status vector
    $ENV(var)  ...................  Value of environment variable
    $FEXIST(file)  ...............  1 if file exists or 0 otherwise
    $SHELL(cmd,N)  ...............  N'th line of shell command output (Unix 
   only)
    $SHELL(cmd,sep)  .............  Shell output with newlines replaced by sep
    $SHELL(cmd)  .................  Same as $SHELL(cmd,' ')


    $CALL('fun(args)')  ..........  Call a Fortran REAL FUNCTION
    $ICALL('ifun(args)')  ........  Call an INTEGER FUNCTION
    $LCALL('lfun(args)')  ........  Call a LOGICAL FUNCTION and return 0 or 1
    $DCALL('dfun(args)')  ........  Call a DOUBLE PRECISION FUNCTION
    $HCDIR()  ....................  Current Hbook working directory
    $HEXIST(id)  .................  1 if histogram ID exists or 0 otherwise
    $HINFO(id,'1DHISTO')  ........  1 if ID is a 1D histogram or 0 otherwise
    $HINFO(id,'2DHISTO')  ........  1 if ID is a 2D histogram or 0 otherwise
    $HINFO(id,'TABLE')  ..........  1 if ID is a table or 0 otherwise
    $HINFO(id,'PROFILE')  ........  1 if ID is a profile histogram or 0 
   otherwise
    $HINFO(id,'NTUPLE')  .........  1 if ID is a Ntuple or 0 otherwise
    $HINFO(id,'LOG')  ............  1 if ID has LOG Y scale or 0 otherwise
    $HINFO(id,'ENTRIES')  ........  Number of entries
    $HINFO(id,'MEAN')  ...........  Mean value
    $HINFO(id,'RMS')  ............  Standard deviation
    $HINFO(id,'EVENTS')  .........  Number of equivalent events
    $HINFO(id,'OVERFLOW')  .......  Content of overflow channel
    $HINFO(id,'UNDERFLOW')  ......  Content of underflow channel
    $HINFO(id,'MIN')  ............  Minimum bin content
    $HINFO(id,'MAX')  ............  Maximum bin content
    $HINFO(id,'SUM')  ............  Total histogram content
    $HINFO(id,'NSLIX')  ..........  Number of X slices
    $HINFO(id,'NSLIY')  ..........  Number of Y slices
    $HINFO(id,'NBANX')  ..........  Number of X bandes
    $HINFO(id,'NBANY')  ..........  Number of Y bandes
    $HINFO(id,'NPROX')  ..........  Projection X (0 or 1)
    $HINFO(id,'NPROY')  ..........  Projection Y (0 or 1)
    $HINFO(id,'XBINS')  ..........  Number of bins in X direction
    $HINFO(id,'XMIN')  ...........  Lower histogram limit in X direction
    $HINFO(id,'XMAX')  ...........  Upper histogram limit in X direction
    $HINFO(id,'YBINS')  ..........  Number of bins in Y direction
    $HINFO(id,'YMIN')  ...........  Lower histogram limit in Y direction
    $HINFO(id,'YMAX')  ...........  Upper histogram limit in Y direction
    $HTITLE(id)  .................  Histogram title
    $GRAFINFO('XZONES')  .........  Number of zones in X direction
    $GRAFINFO('YZONES')  .........  Number of zones in Y direction
    $GRAFINFO('NT')  .............  Current Normalization Transformation number
    $GRAFINFO('WNXMIN')  .........  Lower X limit of window in current NT
    $GRAFINFO('WNXMAX')  .........  Upper X limit of window in current NT
    $GRAFINFO('WNYMIN')  .........  Lower Y limit of window in current NT
    $GRAFINFO('WNYMAX')  .........  Upper Y limit of window in current NT
    $GRAFINFO('VPXMIN')  .........  Lower X limit of viewport in current NT
    $GRAFINFO('VPXMAX')  .........  Upper X limit of viewport in current NT
    $GRAFINFO('VPYMIN')  .........  Lower Y limit of viewport in current NT
    $GRAFINFO('VPYMAX')  .........  Upper Y limit of viewport in current NT
    $GRAFINFO('TXALIH')  .........  Horizontal text alignment
    $GRAFINFO('TXALIV')  .........  Vertical text alignment
    $GRAFINFO('TXFONT')  .........  Text font
    $GRAFINFO('TXPREC')  .........  Text precision
    $GRAFINFO('attr')  ...........  HPLOT/HIGZ attributes (see HELP SET for 
   valid names)
    $OPTION('option')  ...........  1 if the option is on 0 otherwise (see 
   HELP OPTION)
    $RGBINFO(icol,'R')  ..........  Weight of Red in color table
    $RGBINFO(icol,'G')  ..........  Weight of Green in color table
    $RGBINFO(icol,'B')  ..........  Weight of Blue in color table
    $CUT(n)  .....................  Cut expression $n
    $CUTEXPAND(string)  ..........  Replace $n in the (quoted) string by 
   $CUT(n)