NumericQ[expr] gives True if expr is a numeric quantity, and False otherwise.

Take[list, n] gives the first n elements of list. Take[list, -n] gives the last n elements of list. Take[list, {m, n}] gives elements m through n of list. Take[list, seq_1, ...

Any combination of equations or inequalities can be thought of as implicitly defining a region in some kind of space. The fundamental function of Reduce is to turn this type ...

Mathematica provides a uniquely powerful interactive environment for building up arbitrarily complex computations, under convenient interactive or programmatic control.

In almost every area where probability and statistics are used there have been found a few parametric distribution families that are known to be good models. The origins vary ...

Mathematica makes it easy to take even the most complicated derivatives involving any of its huge range of differentiable special functions.

Contours is an option for contour plots that specifies the contours to draw.

GenomeLookup["seq"] returns the positions of exact matches for the DNA sequence seq on the reference human genome.GenomeLookup["seq", n] returns at most n matches.

Missing[] represents data that is missing.Missing["reason"] specifies a reason for the data being missing.Missing["reason", expr] associates the expression expr with the ...

Sequence[expr_1, expr_2, ...] represents a sequence of arguments to be spliced automatically into any function.