getNavState.m

function retState = getNavState(state)
  % Return description of navigation state number
  % All descriptions are from px4 code here 
  % https://github.com/PX4/Firmware/blob/d3c37e0206c4ed50e64ade05c95a580a5bb18eb7/msg/vehicle_status.msg#L23
  % Author: Kyuhyong You
  % Date: 2018/9/28
  switch(state)
    case 0
      retState = 'Manual';
    case 1
      retState = 'ALTCTL';
    case 2
      retState = 'POSCTL';
    case 3
      retState = 'AUTO';
    case 4
      retState = 'LOITER';
    case 5
      retState = 'RTL';
    case 6
      retState = 'RECOVER';
    case 7
      retState = 'RTGS';
    case 8
      retState = 'LandEngFail';
    case 9
      retState = 'LandGPSFail';
    case 10
      retState = 'ACRO';
    case 11
      retState = 'UNUSED';
    case 12
      retState = 'DESCEND';
    case 13
      retState = 'TERMINATE';
    case 14
      retState = 'OFF BRD';
    case 15
      retState = 'STAB';
    case 16
      retState = 'Rattitude';
    case 17
      retState = 'Auto TO';
    case 18
      retState = 'Auto Land';
    case 19
      retState = 'FLW TGT';
    case 20
      retState = 'Prec Land';
    case 21
      retState = 'Max';
    otherwise
      retState = 'Not supported';
  end