CALL: BOOK_HISTOGRAM: options


AUTOSCALE

  Requests automatic computation of the histogram range.

  When this option is in effect, a rough range is set to

       [mean - 3*RMS, mean + 3*RMS]

  where the mean and the RMS are computed from the first
  n_bin/2 entries, with n_bin is the number of bins.

  The range is then enlarged a bit by rounding the limits
  to 1, 2 or 5 times a power of 10. If the INTEGER option
  has been set, then the limits are in addition forced to
  be integer numbers.

  An histogram can not be used in arithmetic operations as
  long as the range has not been set.

  The options MANUAL and AUTOSCALE are mutually exclusive.

  [Default: The automatic range option is off by default
  but is implied if minimum and maximum are not specified.]

INTEGER

  Requests the bin width of the histogram to be an integer
  value. The smallest possible bin size is therefore 1. The
  bins will be aligned such that integer numbers fall in
  the middle of the bins.

  The INTEGER/REAL setting only has effect when the range is
  established automatically.

  [Default is REAL]

MANUAL

  Requests the histogram range as specified in the argument
  list be respected, i.e. the range is not automatically
  computed and the specified range is not rounded.

  When MANUAL is in effect, the histogram can be used in
  arithmetic expressions from the moment it has been booked.

  The options MANUAL and AUTOSCALE are mutually exclusive.

  [This is default if a range is specified.]

REAL

  Allows the bin width to be a non-integer number. The
  automatic scaling algorithm rounds the range limits to
  multiples 1, 2 or 5 times a power of 10.

  The INTEGER/REAL setting only has effect when the range
  is established automatically.

  [This is default.]

Keyword index. Formatted on 10/11/98.