Picking Out Pieces of Algebraic ... (Mathematica Tutorial)

Functions to pick out pieces of polynomials. Here is an algebraic expression. This gives the coefficient of x in e.

NFourierCosCoefficient (Fourier Series Package Symbol)

NFourierCosCoefficient[expr, t, n] gives a numerical approximation to the n\[Null]^th coefficient in the Fourier cosine series expansion of expr, where expr is a periodic ...

Position (Built-in Mathematica Symbol)

Position[expr, pattern] gives a list of the positions at which objects matching pattern appear in expr. Position[expr, pattern, levelspec] finds only objects that appear on ...

RealExponent (Built-in Mathematica Symbol)

RealExponent[x] gives log_10 (|x|).RealExponent[x, b] gives log_b (|x|).

SiegelTheta (Built-in Mathematica Symbol)

SiegelTheta[\[CapitalOmega], s] gives the Siegel theta function \[CapitalTheta] (\[CapitalOmega], s) with Riemann modular matrix \[CapitalOmega] and vector ...

Use Built-in Gamepad Support (Mathematica How To)

Mathematica supports using joysticks, gamepads, 3D mice, and all other controller devices that follow the HID specification. In fact, in many cases, there is zero setup ...

Encode (Built-in Mathematica Symbol)

Encode["source", " dest"] writes an encoded version of the file source to the file dest. << dest decodes the file before reading its contents. Encode["source", " dest", " ...

FileHash (Built-in Mathematica Symbol)

FileHash["file"] gives an integer hash code for the contents of the specified file.FileHash["file", " type"] gives an integer hash of the specified type.

FindDivisions (Built-in Mathematica Symbol)

FindDivisions[{x_min, x_max}, n] finds a list of about n "nice" numbers that divide the interval around x_min to x_max into equally spaced parts. FindDivisions[{x_min, x_max, ...

Sign (Built-in Mathematica Symbol)

Sign[x] gives -1, 0, or 1 depending on whether x is negative, zero, or positive.