nthroot

Real n-th root of an array.

Syntax

Y = nthroot(X, n)

Description

Returns the real n-th root of each element of X. n must be a positive integer scalar. For odd n, negative inputs return real negative results; for even n, negative inputs raise a complex domain warning (or return NaN depending on element type). Equivalent to X.^(1/n) for positive X.

Examples

nthroot(27, 3)         % 3
nthroot(-8, 3)         % -2  (cube root of -8)
nthroot([1 8 27], 3)   % [1 2 3]

See also

• floor — Round toward negative infinity.
• round — Round to the nearest integer (or to a specified number of digits).