Accessing arc labelling information

A number of the actual values used to label arcs are available directly as [B/D] operators as follows.

• The arcin  operator can be used to access the resolutions shaded in region of Table 11.1.
• The arcout  operator can be used to access the resolutions shaded in region of Table 11.1.
• If appropriate, the arcind  operator can be used to access the size ratios shaded in region of Table 11.2. The actual size ratio is returned.
• If appropriate, the arcoutd  operator can be used to access the size ratios shaded in region of Table 11.2. The actual size ratio is returned.
• If appropriate, the arcpc  operator can be used to access the path correlation drawn on an arc.

These operators are always available when an influence diagram has been drawn. However, as it is costly to calculate the measurements needed for the labels, by default they are not calculated for standard adjustments. However, you can force calculation of these values by switching off the noinfluence  control. The SCAN:  command returns similar labelling information, although in terms of overall adjusted uncertainties rather than partial resolutions.