refactor output code

cmd/root.go

@@ -72,27 +72,12 @@ func parse(cmd *cobra.Command, args []string) {
 		panic("not an absorbing Markov chain!")
 	}
 
-	fmtOptions := make([]mat.FormatOption, 0)
+	matrix, err := orderedAdjMatrix(graph)
-	if matlabFmt {
-		fmtOptions = append(fmtOptions, mat.FormatMATLAB())
-	} else if pythonFmt {
-		fmtOptions = append(fmtOptions, mat.FormatPython())
-	}
-
-	a, err := orderedAdjMatrix(graph)
 	if err != nil {
 		panic(err)
 	}
 
-	out := mat.Formatted(a, fmtOptions...)
+	outputMatrix(matrix)
-
-	// for matlab and python formats, %#v outputs as matrix and %v is
-	// oneline, but for standard format, it's the opposite, so we xor
-	if (matlabFmt || pythonFmt) != oneline {
-		fmt.Printf("%#v\n", out)
-	} else {
-		fmt.Printf("%v\n", out)
-	}
 }
 
 func orderedAdjMatrix(g *markov.AbsorbingMarkovChain) (*mat.Dense, error) {
@@ -125,6 +110,25 @@ func orderedAdjMatrix(g *markov.AbsorbingMarkovChain) (*mat.Dense, error) {
 	return matrix, nil
 }
 
+func outputMatrix(matrix mat.Matrix) {
+	fmtOptions := make([]mat.FormatOption, 0)
+	if matlabFmt {
+		fmtOptions = append(fmtOptions, mat.FormatMATLAB())
+	} else if pythonFmt {
+		fmtOptions = append(fmtOptions, mat.FormatPython())
+	}
+
+	out := mat.Formatted(matrix, fmtOptions...)
+
+	// for matlab and python formats, %#v outputs as matrix and %v is
+	// oneline, but for standard format, it's the opposite, so we xor
+	if (matlabFmt || pythonFmt) != oneline {
+		fmt.Printf("%#v\n", out)
+	} else {
+		fmt.Printf("%v\n", out)
+	}
+}
+
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {