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New in 7.0: Lists and Matrices   (Mathematica Guide)
Mathematica 7 extends its general treatment of lists and matrices by adding a variety of convenient functions, including support for common convolution and structure matrices.
HeavisidePi   (Built-in Mathematica Symbol)
HeavisidePi[x] represents the box distribution \[CapitalPi](x), equal to 1 for |x| < 1/2 and 0 for |x| > 1/2.HeavisidePi[x_1, x_2, ...] represents the multidimensional box ...
WienerFilter   (Built-in Mathematica Symbol)
WienerFilter[image, r] removes noise from image by applying a range-r Wiener filter.WienerFilter[image, r, ns] assumes an additive noise power value ns.
LineIntegralConvolutionPlot   (Built-in Mathematica Symbol)
LineIntegralConvolutionPlot[{{v_x, v_y}, image}, {x, x_min, x_max}, {y, y_min, y_max}] generates a line integral convolution plot of image convolved with the vector field ...
DiagonalMatrix   (Built-in Mathematica Symbol)
DiagonalMatrix[list] gives a matrix with the elements of list on the leading diagonal, and 0 elsewhere. DiagonalMatrix[list, k] gives a matrix with the elements of list on ...
ArrayFlatten   (Built-in Mathematica Symbol)
ArrayFlatten[{{m_11, m_12, ...}, {m_21, m_22, ...}, ...}] creates a single flattened matrix from a matrix of matrices m i j. ArrayFlatten[a, r] flattens out r pairs of levels ...
UnitBox   (Built-in Mathematica Symbol)
UnitBox[x] represents the unit box function, equal to 1 for |x| <= 1/2 and 0 otherwise.UnitBox[x_1, x_2, ...] represents the multidimensional unit box function, equal to 1 if ...
UnitTriangle   (Built-in Mathematica Symbol)
UnitTriangle[x] represents the unit triangle function on the interval |x| <= 1 .UnitTriangle[x_1, x_2, ...] represents the multidimensional unit triangle function on the ...
ArrayPad   (Built-in Mathematica Symbol)
ArrayPad[array, m] gives an array with m 0s of padding on every side. ArrayPad[array, m, padding] uses the specified padding.ArrayPad[array, {m, n}, ...] pads with m elements ...
Sign   (Built-in Mathematica Symbol)
Sign[x] gives -1, 0, or 1 depending on whether x is negative, zero, or positive.
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