Subfactorial[n] gives the number of permutations of n objects that leave no object fixed.

VectorColorFunction is an option for VectorPlot and related functions which specifies a function to apply to determine colors of field vectors drawn.

WaitNext[{eid_1, eid_2, ...}] waits until the first evaluation represented by any of the eid_i finishes, then returns its result, the corresponding eid_i, and the list of ...

Xnor[e_1, e_2, ...] is the logical XNOR (not XOR) function. It gives True if an even number of the e_i are True, and the rest are False. It gives False if an odd number of ...

Cellular automata provide a convenient way to represent many kinds of systems in which the values of cells in an array are updated in discrete steps according to a local ...

Use Curated Data Clean up Data Imported from a Website Clean up Data Imported from a ZIP File

Finding the date and time. This gives the current date and time. The Mathematica DateList function returns whatever your computer system gives as the current date and time. ...

Harwell\[Dash]Boeing matrix format. Used for exchanging and storing sparse matrices. Plain text format. File format of the Harwell\[Dash]Boeing collection of standard test ...

Matrix Market matrix format. Used for exchanging and storing test matrices. Plain text format. File format of the NIST Matrix Market collection of standard test matrices. ...

NEXUS phylogenetic file format. Commonly used for storage and exchange of phylogenetic data. Can store DNA and protein sequences, taxa distances, alignment scores, and ...