Matlab程序报错,问下高手那里出错了

Matlab程序报错,问下高手那里出错了
tic;
for k=1:N
D = min(D,repmat(D(:,k),[1 N])+repmat(D(k,:),[N 1]));
if ((verbose == 1) & (rem(k,20) == 0))
disp([' Iteration:' num2str(k) ' Estimated time to completion:'num2str((N-k)*toc/k/60) ' minutes']);
end
end
显示错误是?Error:File:Isomap.m Line:141 Column:80
Unexpected MATLAB expression.
disp([' Iteration:' num2str(k) ' Estimated time to completion:'num2str((N-k)*toc/k/60) ' minutes']);
是这一行报错