Syntax
The $ argument is used as shorthand for all possible arguments
to the LOOK: command. Any defined restriction will apply as
appropriate to each successive argument.
where N1, N2,
...are the names of assignments, separated by commas.
To display assigments we use the a argument. This can be used
with or without a restriction. Firstly, when this argument is
used without a restriction, all of the assignments known to the program are
displayed. Secondly, when a restriction is applied, the display is
limited to the named assignments.
Where the assignments are known linear combinations of elements, these
are displayed as such. Otherwise (for example, if parts of the
assignment are functional) various information about the functionally
defined assignment is displayed.
For functionally defined assignments, any name supplied in the
restriction need contain only the stem of the assignment; any extraneous
features are removed. For example, suppose that the functional assignment
x.i.j has been defined. To examine it, any one of the following
0commands would suffice:
where N1, N2,
...are the names of bases, separated by commas.
To display bases we use the b argument. This can be used
with or without a restriction. Firstly, when this argument is
used without a restriction, all of the assignments known to the program are
displayed. Secondly, when a restriction is applied, the display is
limited to the named bases. The names of the elements contained in each
listed base are displayed in the order given by the ordering convention.
See §6.2 for details of
specifying collections for the definition part.
BD>look : (grid ) [ N1, N2, ...]
where N1, N2,
...are the names of bases or elements, separated by commas.
The grid argument displays information set using the
GRID: command. The argument can be used with or without a
restriction. Firstly, when this argument is used without a restriction,
all of the grid information known to the program is displayed. Secondly,
when a restriction is applied, the information is limited to the named
bases and elements. The information displayed is as follows.
To display constants we use the c argument. This argument is used
without a restriction. The names of the constants are displayed in
in the order given by the ordering convention, together with their values.
The commands argument is used to display a list of all the
possible [B/D] commands, together with short descriptions. This argument
is used without a restriction.
The various [B/D] controls may be listed by using the controls
argument. This argument is used without a restriction. The names of
the controls are displayed, together with a brief decsription. The
nc argument displays the values of certain controls.
where N1, N2,
...are the names of elements or bases or data-carriers,
separated by commas.
To display data we use the d argument. This can be used
with or without a restriction. Firstly, when this argument is used
without a restriction, all of the data known to the program are
displayed. Secondly, when a restriction is applied, the display is
limited to the data on the named data carriers. The names of the data
carriers are displayed in the order given by the ordering convention.
See §6.2 for details of
specifying collections for the definition part.
The quantity of data output is controlled
by the autoselect control as follows. If the autoselect
control is on then all possible data is shown. If the control is off,
data selection is as determined beforehand, according to prior usages of
the SELECT: command.
Notice that the SUMMARY: command can be used to summarise
various features of the data: means, standard deviations, correlations,
and so forth.
This is a programming tool enabling inspection of the starting positions
and lengths of freed locations in the data storage area.
This is another programming tool enabling inspection of the starting positions
and lengths of freed locations in the data storage area.
where the option i is a valid expectation store number, and
N1, N2,
...are the names of elements or bases, separated by commas.
To display the names of currently defined elements we use the
e argument. This can be used with or without a
restriction. Firstly, when this argument is used without a restriction,
all of the elements known to the program are displayed. Secondly, when a
restriction is applied, the display is limited to the elements given by
the collection represented in the restriction. The element names
are displayed in the order given by the ordering convention.
See §6.2 for details of
specifying collections for the definition part.
The first form of the syntax displays element names together with their
expectations in all expectation stores. The second form of the syntax displays element names,
their expectations in expectation store i , and their standard deviations in belief store i.
The f argument to the LOOK: command produces a list of
functions defined so far. These are produced in the order given by
the ordering convention. This argument is used without a
restriction.
The fe argument to the LOOK: command produces a list of
functionally-defined expectations. These are displayed in the order
given by the ordering convention. This argument is used without a
restriction.
The files argument is used to display information about the link between
[B/D]'s internal input and output channels and
various external files. For each defined input and output
channel, the full name of the associated external file is printed.
Finally, the names of the external files associated with the log file
(set using the log argument to the KEEP:
command), the history file
(set using the history argument to the KEEP: command), and
the help file are displayed.
This argument is used without a restriction.
Active [B/D] for-statements, together with the current values of the
control variables and their initialising values, may be listed by using
the for argument. This argument is used without a restriction.
where the option i is a valid belief store number.
The fvar argument is used to summarise the current
functionally-defined variance-covariance specifications.
The first form of the syntax displays functionally defined variances and covariances
for
all of the belief stores. The second form of the syntax limits the display
to variances and covariances in belief store i.
This argument is used without a restriction.
Declared indices, as defined by INDEX: commands,
together with the name of the
control variables and their initialising values, may be listed by using
the i argument. This argument is used without a restriction.
The KEEP: command is used to select material to be retained in
user-defined quantities.
The keep argument displays a list of the possible retentions to
the KEEP: command, with brief descriptions.
This argument is used without a restriction.
Several quantities may be stored under user-defined names via the
KEEP: command. The kept argument here displays these
user-defined names.
This argument is used without a restriction.
where the option i is a valid input channel number.
The l argument is used to display labels, and is issued without a
restriction. The first form of the syntax displays the labels currently
defined on all open input channels. The second form of the syntax is
used to display only the labels on input channel i.
Only those labels that are
accompanied by comments (text that follows the label on the same line, and
separated from the label by at least one space), are printed.
The labels are produced in the order
given by the ordering convention.
This argument is used without a restriction.
The lall argument is similar, but displays all labels, regardless
of any accompanying comments.
where the option i is a valid input channel number.
The lall argument is used to display labels, and is issued without a
restriction. The first form of the syntax displays the labels currently
defined on all open input channels. The second form of the syntax is
used to display only the labels on input channel i.
This argument is used without a restriction.
All labels are printed, in the order
given by the ordering convention.
The l argument is similar, but displays only those labels
accompanied by comments.
To display the most important run-time restrictions we use the
program argument. This argument is used
without a restriction. The information displayed concerns the
following.
The nc argument, which is used without a restriction,
displays a list of the current values of the following
controls:
The operands argument displays a list of [B/D] operands (for example
rmtr and prmrank ) usable in [B/D] equations, together
with brief descriptions of them.
This argument is used without a restriction.
The operators argument displays a list of [B/D] operators (for example
eig and centile ) usable in [B/D] equations, together
with brief descriptions of them.
This argument is used without a restriction.
The options argument displays a list of the possible arguments to
the OPTION: command, with brief descriptions.
This argument is used without a restriction.
The path argument is used to display
the current values of the search path variables
BDINPUTS and BDMACROS .
This argument is used without a restriction.
where the option i is a valid belief store number, and
N1, N2,
...are the names of elements or bases, separated by commas.
To display beliefs (in correlation form) specified about currently
defined elements, we use the r argument. This can be used
with or without a restriction. Firstly, when this argument is used
without a restriction, beliefs about all of the elements known to the
program are displayed. Secondly, when a restriction is applied, the
display is limited to beliefs about the elements given by the collection
represented in the restriction. Beliefs are displayed for element
names in the order given by the ordering convention. See
§6.2 for details of specifying collections for the
definition part.
The first form of the syntax displays correlations for all of the belief
stores. The second form of the syntax limits the display to
correlations in belief store i.
In the case of any ``variance'' terms being not positive, all the
corresponding ``correlation'' terms are marked with a dash rather than a
number.
The s argument displays the names of all currently-defined
strings, together with the title to be used for plots, influence
diagrams, and partial correlation diagrams, if such titles has been
defined using the TITLE: , ITITLE: , and
PCTITLE: commands. This argument is used without a
restriction.
where the option i is a valid belief store number, and
N1, N2,
...are the names of elements or bases, separated by commas.
To display beliefs (in variance-covariance form) specified about
currently defined elements, we use the v argument. This can
be used with or without a restriction. Firstly, when this argument
is used without a restriction, beliefs about all of the elements known
to the program are displayed. Secondly, when a restriction is applied,
the display is limited to beliefs about the elements given by the
collection represented in the restriction. Beliefs are displayed
for element names in the order given by the ordering convention. See
§6.2 for details of specifying collections for the
definition part.
The first form of the syntax displays variances and covariances for all
of the belief stores. The second form of the syntax limits the display
to variances and covariances in belief store i.
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