Next: Utility Functions, Previous: Trigonometry, Up: Arithmetic [Contents][Index]
Sum of elements along dimension dim. If dim is omitted, it defaults to the first non-singleton dimension.
If the optional argument "native"
is given, then the sum is
performed in the same type as the original argument, rather than in the
default double type. For example:
sum ([true, true]) ⇒ 2 sum ([true, true], "native") ⇒ true
On the contrary, if "double"
is given, the sum is performed in
double precision even for single precision inputs.
For double precision inputs, "extra"
indicates that a more accurate
algorithm than straightforward summation is to be used. For single precision
inputs, "extra"
is the same as "double"
. Otherwise,
"extra"
has no effect.
Product of elements along dimension dim. If dim is omitted, it defaults to the first non-singleton dimension.
Cumulative sum of elements along dimension dim. If dim is omitted, it defaults to the first non-singleton dimension.
See sum
for an explanation of the optional parameters
"native"
, "double"
, and "extra"
.
Cumulative product of elements along dimension dim. If dim is omitted, it defaults to the first non-singleton dimension.
Sum of squares of elements along dimension dim. If dim is omitted, it defaults to the first non-singleton dimension.
This function is conceptually equivalent to computing
sum (x .* conj (x), dim)
but it uses less memory and avoids calling conj
if x is real.
Next: Utility Functions, Previous: Trigonometry, Up: Arithmetic [Contents][Index]