Data commit

Task/Singular-value-decomposition/Go/singular-value-decomposition.go

@@ -0,0 +1,33 @@
+<package main
+
+import (
+    "fmt"
+    "gonum.org/v1/gonum/mat"
+    "log"
+)
+
+func matPrint(m mat.Matrix) {
+    fa := mat.Formatted(m, mat.Prefix(""), mat.Squeeze())
+    fmt.Printf("%13.10f\n", fa)
+}
+
+func main() {
+    var svd mat.SVD
+    a := mat.NewDense(2, 2, []float64{3, 0, 4, 5})
+    ok := svd.Factorize(a, mat.SVDFull)
+    if !ok {
+        log.Fatal("Something went wrong!")
+    }
+    u := mat.NewDense(2, 2, nil)
+    svd.UTo(u)
+    fmt.Println("U:")
+    matPrint(u)
+    values := svd.Values(nil)
+    sigma := mat.NewDense(2, 2, []float64{values[0], 0, 0, values[1]})
+    fmt.Println("\nΣ:")
+    matPrint(sigma)
+    vt := mat.NewDense(2, 2, nil)
+    svd.VTo(vt)
+    fmt.Println("\nVT:")
+    matPrint(vt)
+}