MATLAB Dijkstra's Algorithm Error: Undefined Function 'Dijkf'

"clear\n\n\nM\u003d100000;\na(1,:)=[0,7,M,6,10,10,13,8,M];\na(2,:)=[zeros(1,2),2,M,M,M,M,M,6];\na(3,:)=[zeros(1,3),M,5,M,M,M,4];\na(4,:)=[zeros(1,4),M,M,M,4,M];\na(5,:)=[zeros(1,5),M,9,M,4];\na(6,:)=[zeros(1,6),7,6,M];\na(7,:)=[zeros(1,7),M,M];\na(8,:)=[zeros(1,8),M];\na(9,:)=zeros(1,9);\na\u003da+a';\n[d index1 index2]\u003dDijkf(a);\nd\n报错内容：Undefined function or variable 'Dijkf'."