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## pointintervalbox

The pointinterval and pointnumber properties of a line type are used only in plot style linespoints. A negative value of pointinterval or pointnumber, e.g. -N, means that before the selected set of point symbols are drawn a box (actually circle) behind each point symbol is blanked out by filling with the background color. The command set pointintervalbox controls the radius of this blanked-out region. It is a multiplier for the default radius, which is equal to the point size. unset pointintervalbox draws no blanked-out region.