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Compute
e^x
for each element of x. To compute the matrix
exponential, see Linear Algebra.
See also: log.
Compute
exp (x) - 1
accurately in the neighborhood of zero.
See also: exp.
Compute the natural logarithm,
ln (x)
,
for each element of x. To compute the
matrix logarithm, see Linear Algebra.
Return the real-valued natural logarithm of each element of x. Report an error if any element results in a complex return value.
Compute
log (1 + x)
accurately in the neighborhood of zero.
Compute the base-10 logarithm of each element of x.
Compute the base-2 logarithm of each element of x.
If called with two output arguments, split x into
binary mantissa and exponent so that
1/2 <= abs(f) < 1
and e is an integer. If
x = 0
, f = e = 0
.
With one argument, computes 2 .^ x for each element of x.
With two arguments, returns f .* (2 .^ e).
If x is a scalar, return the first integer n such that 2^n ≥ abs (x).
If x is a vector, return nextpow2 (length (x))
.
Compute the real-valued, element-by-element power operator. This is
equivalent to x .^ y
, except that realpow
reports an error if any return value is complex.
Compute the square root of each element of x. If x is negative, a complex result is returned. To compute the matrix square root, see Linear Algebra.
Return the real-valued square root of each element of x. Report an error if any element results in a complex return value.
Compute the real cube root of each element of x.
Unlike x^(1/3)
, the result will be negative if x is
negative.
See also: nthroot.
Compute the n-th root of x, returning real results for real components of x. For example:
nthroot (-1, 3) ⇒ -1 (-1) ^ (1 / 3) ⇒ 0.50000 - 0.86603i
x must have all real entries. n must be a scalar. If n is an even integer and X has negative entries, an error is produced.
Next: Complex Arithmetic, Up: Arithmetic [Contents][Index]