ReplaceAll (Built-in Mathematica Symbol)

expr /. rules applies a rule or list of rules in an attempt to transform each subpart of an expression expr.

ReplaceList (Built-in Mathematica Symbol)

ReplaceList[expr, rules] attempts to transform the entire expression expr by applying a rule or list of rules in all possible ways, and returns a list of the results ...

Replace (Built-in Mathematica Symbol)

Replace[expr, rules] applies a rule or list of rules in an attempt to transform the entire expression expr. Replace[expr, rules, levelspec] applies rules to parts of expr ...

ReplacePart (Built-in Mathematica Symbol)

ReplacePart[expr, i -> new] yields an expression in which the i\[Null]\[Null]^th part of expr is replaced by new. ReplacePart[expr, {i_1 -> new_1, i_2 -> new_2, ...}] ...

ReplaceRepeated (Built-in Mathematica Symbol)

expr //. rules repeatedly performs replacements until expr no longer changes.

Resampling (Built-in Mathematica Symbol)

Resampling is an option that specifies the method to be used for resampling images.

Rescale (Built-in Mathematica Symbol)

Rescale[x, {min, max}] gives x rescaled to run from 0 to 1 over the range min to max. Rescale[x, {min, max}, {x_min, x_max}] gives x rescaled to run from x_min to x_max over ...

RescalingTransform (Built-in Mathematica Symbol)

RescalingTransform[{{x_min, x_max}, {y_min, y_max}, ...}, {{xp_min, xp_max}, ...}] gives a TransformationFunction that rescales the region with coordinate ranges x_min to ...

ResetDirectory (Built-in Mathematica Symbol)

ResetDirectory[] resets the current working directory to its previous value.

ResetScheduledTask (Built-in Mathematica Symbol)

ResetScheduledTask[obj] resets scheduled task object obj to the original parameter values.ResetScheduledTask[obj, timespec] resets scheduled task timing to ...