MATLAB sort file lines by fisrt word : I have a file like in this format :

    22 BLBL asas saaa212 x:12 y:123
    66 BLadsBL asas saaa212 x:12 y:123
    32 BLadsBL asas saaa212 x:13212 y:123
    66 BLadsBL asas saaa212 x:1332 y:123

How would one create a new file with those lines sorted by the first value?

Preferred in MATLAB