WaveletMatrixPlot[dwd] plots the basis tree of wavelet matrix coefficients in the DiscreteWaveletData dwd.WaveletMatrixPlot[dwd, r] plots coefficients up to refinement level ...
WaveletScale is an option for ContinuousWaveletTransform and related constructs used to specify the smallest resolvable scale.
WindowMargins is a notebook option that specifies what margins to leave around the window that is used to display the notebook on the screen.
WindowStatusArea is a notebook option that specifies what should appear in the status area in the frame of the window used to display the notebook.
WolframAlpha["query"] sends query to Wolfram|Alpha and imports the output.WolframAlpha["query", format] imports the output according to the specified format.
WordData["word", " property"] gives the specified property for the English word " word".WordData["word"] gives a list of full word specifications representing possible uses ...
Zeta
(Built-in Mathematica Symbol) Zeta[s] gives the Riemann zeta function \[Zeta](s). Zeta[s, a] gives the generalized Riemann zeta function \[Zeta](s, a).
ZTest
(Built-in Mathematica Symbol) ZTest[data] tests whether the mean of the data is zero. ZTest[{data_1, data_2}] tests whether the means of data_1 and data_2 are equal.ZTest[dspec, \[Sigma]] tests for zero ...
$Failed
(Built-in Mathematica Symbol) $Failed is a special symbol returned by certain functions when they cannot do what they were asked to do.
$FrontEnd is a global variable that specifies to what front end object, if any, the kernel is currently connected.