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SECTION 11. OUTPUT PROCESSING INSTRUCTIONS
11-5
values are the contributions of the sub-ranges
to the overall weighted value. To obtain the
average of the weighted values that occurred
while the bin select value was within a
particular sub-range, the value output to Final
Storage must be divided by the fraction of time
that the bin select value was within that
particular sub-range (i.e., a standard histogram
of the bin select value must also be output).
For either histogram, the user must specify: 1)
the number of repetitions, 2) the number of
bins, 3) a form code specifying whether a
closed or open form histogram is desired (see
below), 4) the bin select value input location,
5) the weighted value input location (see
below), 6) the lower range limit, and 7) the
upper range limit.
The standard histogram (frequency distribution)
is specified by entering "0" in the weighted
value input location parameter. Otherwise, this
parameter specifies the input location of the
weighted value. When more than one
repetition is called for, the bin select value
location will be incremented each repetition and
the weighted value location will remain the
same (same weighted value sorted on the basis
of different bin select values). The weighted
value location will be incremented if it is entered
as an indexed location (key "C" at some point
while keying in Parameter 5; two dashes, --, will
appear on the right of the display). At the
user's option, the histogram may be either
closed or open. The open form includes all
values below the lower range limit in the first
bin and all values above the upper range limit in
the last bin. The closed form excludes any
values falling outside of the histogram range.
The difference between the closed and open
form is shown in the following example for
temperature values:
Lower range limit 10°C
Upper range limit 30°C
Number of bins 10
Closed Form Open Form
Range of first bin 10 to 11.99 deg. <12 deg.
Range of last bin 28 to 29.99 deg. >28 deg.
A common use of a closed form weighted value
histogram is the wind speed rose. Wind speed
values (the weighted value input) are
accumulated into corresponding direction
sectors (bin select input).