IsNegative

Tests if a numeric entity is negative.

Syntax

• IsNegative(x[, ε])

  • x is a number, a vector, or a matrix

  • ε is a positive number

Description

If x is a number, a vector, or a matrix, then IsNegative(x, ε) returns true iff x is negative, all components of x are negative, or all entries of x are negative, respectively. Floating-point numbers are compared using epsilon ε. If omitted, a default (non-zero) value will be used for ε.

Examples

IsNegative(−IdentityMatrix(5))

false

See also

• IsZero

• IsNonZero

• IsPositive

• IsNonPositive

• IsNonNegative