首先先列出matlab中help文件对zeros函数的解释：
ZEROS Zeros array.
ZEROS(N) is an N-by-N matrix of zeros.
ZEROS(M,N) or ZEROS([M,N]) is an M-by-N matrix of zeros.
ZEROS(M,N,P,...) or ZEROS([M N P ...]) is an M-by-N-by-P-by-...array of
zeros.
ZEROS(SIZE(A)) is the same size as A and all zeros.
ZEROS with no arguments is the scalar 0.
ZEROS(M,N,...,CLASSNAME) or ZEROS([M,N,...],CLASSNAME) is an
M-by-N-by-...array of zeros of class CLASSNAME.
Note:The size inputs M,N,and P...should be nonnegative integers.
Negative integers are treated as 0.
Example:
x = zeros(2,3,'int8');
然后是自己的解释：
zeros就是用来表示线性代数的0矩阵.
比如：zeros（3,3） 表示3行3列0矩阵.
