Reference · Vectors

vec.abs

vec.abs(list) -> list

What it does

Each item's absolute value: negatives turned positive, the rest as they are. A list of only ints gives ints; a list with a float in it gives floats throughout.

Examples

print(vec.abs([-1, 2, -3]))print(vec.abs([-1.5, 2.5]))

[1, 2, 3][1.5, 2.5]

Edge cases

• One float makes the whole result floats: vec.abs([-1, 2.5]) is [1.0, 2.5].
• The empty list, or null, gives the empty list.
• -0.0 becomes 0.0; -inf becomes inf; NaN stays NaN.

print(vec.abs([-1, 2.5]))print(vec.abs([]), vec.abs(null))print(vec.abs([-0.0, -math.inf]))

[1.0, 2.5][] [][0.0, inf]

Errors

An item that is not an int or a float, or an argument that is not a list, is a runtime error, not an error value.

print(vec.abs([1, "a"]))

line 1: `vec.abs` expects a list of numbers, but item 1 is str

Chaining

The size of each change, whichever way it went, and the mean absolute deviation:

let sales = [3, 5, 4, 6, 8]print(sales | vec.diff | vec.abs)print(sales | vec.sub(stats.mean(sales)) | vec.abs | stats.mean)

[2, 1, 2, 2]1.44

See also

abs, vec.sub, vec.diff, vec.norm, math.fabs

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