aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

June 2018 Update

Browse source
This commit is contained in:
Ingy döt Net 2018-06-22 20:57:24 +00:00
parent ba8067c3b7
commit 22f33d4004
5278 changed files with 84726 additions and 14379 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Task/Polynomial-regression/Ruby/polynomial-regression-1.rb
View file

@ -1,10 +1,10 @@
require 'matrix'
def regress x, y, degree
x_data = x.map { |xi| (0..degree).map { |pow| (xi**pow).to_f } }
x_data = x.map { |xi| (0..degree).map { |pow| (xi**pow).to_r } }
mx = Matrix[*x_data]
my = Matrix.column_vector(y)
((mx.t * mx).inv * mx.t * my).transpose.to_a[0]
((mx.t * mx).inv * mx.t * my).transpose.to_a[0].map(&:to_f)
end

8
Task/Polynomial-regression/Ruby/polynomial-regression-2.rb
View file

@ -1,5 +1,3 @@
betas = regress [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
[1, 6, 17, 34, 57, 86, 121, 162, 209, 262, 321],
2
p betas
p regress([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
[1, 6, 17, 34, 57, 86, 121, 162, 209, 262, 321],
2)