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Removed sum_of_squares() as it's redundant with sqr(vector)

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Garth Minette
2020-09-28 16:56:18 -07:00
parent 37ae0cbba0
commit 23bcc1b806
3 changed files with 2 additions and 22 deletions
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14
math.scad
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@@ -552,18 +552,6 @@ function _cumsum(v,_i=0,_acc=[]) =
);
// Function: sum_of_squares()
// Description:
// Returns the sum of the square of each element of a vector.
// Arguments:
// v = The vector to get the sum of.
// Example:
// sum_of_squares([1,2,3]); // Returns: 14.
// sum_of_squares([1,2,4]); // Returns: 21
// sum_of_squares([-3,-2,-1]); // Returns: 14
function sum_of_squares(v) = sum(vmul(v,v));
// Function: sum_of_sines()
// Usage:
// sum_of_sines(a,sines)
@@ -760,7 +748,7 @@ function _qr_factor(A,Q,P, pivot, column, m, n) =
column >= min(m-1,n) ? [Q,A,P] :
let(
swap = !pivot ? 1
: _swap_matrix(n,column,column+max_index([for(i=[column:n-1]) sum_of_squares([for(j=[column:m-1]) A[j][i]])])),
: _swap_matrix(n,column,column+max_index([for(i=[column:n-1]) sqr([for(j=[column:m-1]) A[j][i]])])),
A = pivot ? A*swap : A,
x = [for(i=[column:1:m-1]) A[i][column]],
alpha = (x[0]<=0 ? 1 : -1) * norm(x),