task.json file to run currently opened .m (octave/matlab) file with Ctrl+Shift+B

task.json

{
  // See https://go.microsoft.com/fwlink/?LinkId=733558
  // for the documentation about the tasks.json format
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Run",
      "type": "shell",
      "windows": {
        "command": "C:\\Octave\\Octave-4.2.1\\bin\\octave-gui.exe",
        "args": ["${file}"]
      },
      "group": {
        "kind": "build",
        "isDefault": true
      },
      "presentation": {
        "reveal": "always",
        "panel": "shared",
        "focus": true
      }
    }
  ]
}