Used With Routines:   CONTOUR,   CONTOURFS,   CONTOUR2

Corresponding System Variable: None.

Specifies a vector containing the contour levels (maximum of 150) drawn by the CONTOUR and CONTOUR2 procedures.

A contour is drawn for each level specified in Levels. If omitted, the data range is divided into approximately six equally-spaced levels.

To draw a contour plot with levels at 1, 100, 1000, and 10000:

CONTOUR, z, Levels=[1, 100, 1000, 10000]

To draw a contour plot with levels at 50, 60, ..., 90, 100:

c_levels = FINDGEN(6) * 10 + 50

CONTOUR, z, Levels=c_levels