This attribute controls the appearance of an annotated coordinate grid (drawn with the AST_GRID routine) by determining whether the numerical labels for each axis of a Plot should be drawn upright or not. It takes a separate value for each physical axis of a Plot so that, for instance, the setting " LabelUp(2)=1" specifies that numerical labels for the second axis should be drawn upright.

If the LabelUp value of a Plot axis is non-zero, it causes numerical labels for that axis to be plotted upright (i.e. as normal, horizontal text), otherwise labels are drawn parallel to the axis to which they apply.

The default is to produce upright labels if the labels are placed around the edge of the plot, and to produce labels that follow the axes if the labels are placed within the interior of the plot (see attribute Labelling).

Plot

• In some circumstances, numerical labels and tick marks are drawn around the edges of the plotting area (see the Labelling attribute). In this case, the value of the LabelUp attribute is ignored.

• If no axis is specified, (e.g. " LabelUp" instead of " LabelUp(2)" ), then a " set" or " clear" operation will affect the attribute value of all the Plot axes, while a " get" or " test" operation will use just the LabelUp(1) value.