[mathjiang]

In an assignment A(I) = B, the number of elements in B and
I must be the same.

I 的尺寸 = B 的尺寸，才能做赋值运算 A(I)=B.

在语句 y(k)=10*x+10 中，右边是向量，左边是标量，不能做赋值运算。