func show() {
if len(os.Args) < 4 {
fmt.Println("Not enough arguments: show <input> <range>")
return
}
r, err := parseRange(os.Args[3])
if err != nil {
fmt.Println(err.Error())
return
}
m, err := matlib.Load(os.Args[2])
if err != nil {
fmt.Println("Failed to read matrix from", os.Args[2], err.Error())
return
}
err = r.apply(m)
if err != nil {
fmt.Println(err.Error())
return
}
for row := r.startRow; row < r.endRow; row++ {
line := ""
for col := r.startCol; col < r.endCol; col++ {
val := m.Get(row, col)
line = line + strconv.FormatFloat(val, 'E', 4, 64) + "\t"
}
fmt.Println(line)
}
}
func invert() {
if len(os.Args) < 4 {
fmt.Println("Not enough arguments: invert <input> <output>")
return
}
m, err := matlib.Load(os.Args[2])
if err != nil {
fmt.Println("Failed to read matrix from", os.Args[2], err.Error())
return
}
err = m.InvertInPlace()
if err != nil {
fmt.Println("Failed to invert matrix", os.Args[2], err.Error())
return
}
err = matlib.Save(m, os.Args[3])
if err != nil {
fmt.Println("Failed to write inverse to", os.Args[3], err.Error())
}
}