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Added deltas()

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Revar Desmera 2019-05-10 03:00:41 -07:00
parent 09e89e9182
commit e946031d99
1 changed files with 14 additions and 2 deletions
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16
math.scad
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@ -226,10 +226,10 @@ function atanh(x) = ln((1+x)/(1-x))/2;
// Function: sum()
// Description:
// Returns the sum of all entries in the given array.
// Returns the sum of all entries in the given list.
// If passed an array of vectors, returns a vector of sums of each part.
// Arguments:
// v = The vector to get the sum of.
// v = The list to get the sum of.
// Example:
// sum([1,2,3]); // returns 6.
// sum([[1,2,3], [3,4,5], [5,6,7]]); // returns [9, 12, 15]
@ -263,6 +263,18 @@ function sum_of_sines(a, sines) =
]);
// Function: deltas()
// Description:
// Returns a list with the deltas of adjacent entries in the given list.
// Given [a,b,c,d], returns [b-a,c-b,d-c].
// Arguments:
// v = The list to get the deltas of.
// Example:
// deltas([2,5,9,17]); // returns [3,4,8].
// deltas([[1,2,3], [3,6,8], [4,8,11]]); // returns [[2,4,5], [1,2,3]]
function deltas(v) = len(v)<2? v : [for (p=pair(v)) p.y-p.x];
// Function: mean()
// Description:
// Returns the mean of all entries in the given array.