17.5.14      SPACE_TYPE

CHARACTER*8 SPACE_TYPE

Define the type of spacing for the contour levels

    LIN       Linear spacings. The Zero contour is always omitted.
    LOG       Exponential spacing
    NONE      No contour levels at all (same as DO_CONTOUR = NO)
    USER      Keep the contour levels specified by command LEVELS

For LOG case, see HELP LEVELS EXPO in the GreG internal help.

As a backward compatibility, a negative spacing is a convention to use the current contour levels, although using SPACE_TYPE = USER should be preferred.