ReflectionMatrix[v] gives the matrix that represents reflection of points in a mirror normal to the vector v.
ReflectionTransform[v] gives a TransformationFunction that represents a reflection in a mirror through the origin, normal to the vector v.ReflectionTransform[v, p] gives a ...
Refresh
(Built-in Mathematica Symbol) Refresh[expr, opts] represents an object whose value in a Dynamic should be refreshed at times specified by the options opts. Refresh[expr, None] specifies that the value of ...
RefreshRate is an option to Animate and related functions which specifies the refresh rate for frames in animations.
RegionBinarize[image, marker, d] gives a binary version of image that includes the foreground pixels of marker and also connected regions whose pixel values are within a ...
RegionFunction is an option for plotting functions that specifies the region to include in the plot drawn.
RegionPlot3D[pred, {x, x_min, x_max}, {y, y_min, y_max}, {z, z_min, z_max}] makes a plot showing the three-dimensional region in which pred is True.
RegularExpression["regex"] represents the generalized regular expression specified by the string " regex".
Remove
(Built-in Mathematica Symbol) Remove[symbol_1, ...] removes symbols completely, so that their names are no longer recognized by Mathematica. Remove["form_1", "form_2", ...] removes all symbols whose names ...
RemoveScheduledTask[obj] remove the obj from the list of currently set tasks.