jeneshicc https://blog.hatena.ne.jp/jeneshicc/ 落書き、時々落学 https://jeneshicc.hatenadiary.org/ 日記 Haskell LU分解@Haskell 遅延評価って便利．自分で評価の順番を明示的に与えなくても， よきにはからってくれる． import Data.Array type Matrix = Array (Int, Int) Double -- assumption: u!(i,i) /= 0 lu :: Matrix -> (Matrix, Matrix) lu a = (l, u) where b = bounds a l = listArray b.map f.range $ b u = listArray b.map g.range $ b f (i,j) | i == j = 1 | i < j =… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjeneshicc.hatenadiary.org%2Fentry%2F20090727%2F1248714464" title="LU分解 - 落書き、時々落学" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2009-07-27 02:07:44 rich https://jeneshicc.hatenadiary.org/entry/20090727/1248714464 1.0 100%