![]() All values are in double precision and are given in Meter-Kilogram-Second (MKS) units. ![]() The following table lists !CONST names and values. The following image displays the colors described in the table above.Ī read-only structure variable that contains physical constants. The following table lists !COLOR names and values (these are essentially the same as those in W3C’s list of web colors): !COLORĪ read-only structure variable that allows you to retrieve color values by providing one of the color name strings listed in the table below. For example, the command: PRINT, ACOS(A) * !RADEGĬonverts a result expressed in radians to one expressed in degrees. System variables can be used just like other variables. The following system variables contain predefined constants or values for use by IDL routines.
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