Data commit

Task/Cramers-rule/Go/cramers-rule-1.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+    "fmt"
+
+    "gonum.org/v1/gonum/mat"
+)
+
+var m = mat.NewDense(4, 4, []float64{
+    2, -1, 5, 1,
+    3, 2, 2, -6,
+    1, 3, 3, -1,
+    5, -2, -3, 3,
+})
+
+var v = []float64{-3, -32, -47, 49}
+
+func main() {
+    x := make([]float64, len(v))
+    b := make([]float64, len(v))
+    d := mat.Det(m)
+    for c := range v {
+        mat.Col(b, c, m)
+        m.SetCol(c, v)
+        x[c] = mat.Det(m) / d
+        m.SetCol(c, b)
+    }
+    fmt.Println(x)
+}

Task/Cramers-rule/Go/cramers-rule-2.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+    "fmt"
+
+    "github.com/skelterjohn/go.matrix"
+)
+
+var m = matrix.MakeDenseMatrixStacked([][]float64{
+    {2, -1, 5, 1},
+    {3, 2, 2, -6},
+    {1, 3, 3, -1},
+    {5, -2, -3, 3},
+})
+
+var v = []float64{-3, -32, -47, 49}
+
+func main() {
+    x := make([]float64, len(v))
+    b := make([]float64, len(v))
+    d := m.Det()
+    for c := range v {
+        m.BufferCol(c, b)
+        m.FillCol(c, v)
+        x[c] = m.Det() / d
+        m.FillCol(c, b)
+    }
+    fmt.Println(x)
+}