[MATLAB基础] 求助：如何写这个数学表达式

[mathjiang]

function F=findF(u,z,v,m)
%u,z,v是矩阵,m是一个实数.
[m1 n1]=size(u);
[m2 n2]=size(z);
[m3 n3]=size(v);

if n1~=n2
error('number of columns of u must equal to that of z')
elseif m1~=n3
error('number of rows of u must equal to that of columns of v')
else
if m2~=m3
error('number of rows of z must equal to that of v')
end
end
for i=1:m1
a(i)=sum(u(i,.^m);
for j=1:m2
for k=1:n1
b(k)=u(i,k)^m*(z(j,k)-v(j,i))^2;
c=sum(a);
end
F(i,j)=c/a(i);
end
end