YAPC::EU 2018 Glasgow Update!

Task/QR-decomposition/Scala/qr-decomposition.scala

@@ -0,0 +1,22 @@
+import java.io.{PrintWriter, StringWriter}
+
+import Jama.{Matrix, QRDecomposition}
+
+object QRDecomposition extends App {
+  val matrix =
+    new Matrix(
+      Array[Array[Double]](Array(12, -51, 4),
+        Array(6, 167, -68),
+        Array(-4, 24, -41)))
+  val d = new QRDecomposition(matrix)
+
+  def toString(m: Matrix): String = {
+    val sw = new StringWriter
+    m.print(new PrintWriter(sw, true), 8, 6)
+    sw.toString
+  }
+
+  print(toString(d.getQ))
+  print(toString(d.getR))
+
+}