Entropy
(Built-in Mathematica Symbol) Entropy[list] gives the base E information entropy of the values in list.Entropy[k, list] gives the base k information entropy.
EstimatorRegulator[ss, {l, \[Kappa]}] constructs the feedback regulator for the StateSpaceModel object ss with estimator and feedback gain matrices l and \[Kappa], ...
ExpToTrig[expr] converts exponentials in expr to trigonometric functions.
ExtentElementFunction is an option to DiscretePlot and DiscretePlot3D that gives a function to use to generate the primitives for rendering each extent element.
Extract
(Built-in Mathematica Symbol) Extract[expr, list] extracts the part of expr at the position specified by list. Extract[expr, {list_1, list_2, ...}] extracts a list of parts of expr. Extract[expr, list, h] ...
FileExtension["file"] gives the file extension for a file name.
FileNameJoin[{"name_1", "name_2", ...}] joins the name_i together into a file name suitable for your current operating system.
FinancialIndicator["ind", par_1, par_2, ...] represents a financial indicator " ind" with parameters par_1, par_2, etc.
FiniteGroupCount[n] gives the number of finite groups of order n.
FontSize is an option for Style and Cell that specifies the default size in printer's points of the font in which to render text.