串联的矩阵的维度不一致怎么解决？

x=1:10;
hot=[0.634194336737739 0.641213548630007 0.640333034247207 0.636571470828397 0.637961734512746 0.623777022148317 0.628646689951718
0.583305130762299 0.560211301906418 0.586777315072025];
a=polyfit(x,hot,2)
串联的矩阵的维度不一致。