Matlab函数：Floor, Ceil, Fix, Round使用详解
floor：朝负无穷方向舍入
B = floor(A) rounds the elements of A to the nearest integers less than or equal to A.
round函数怎么使用matlab
ceil：朝正无穷方向舍入
B = ceil(A) rounds the elements of A to the nearest integers greater than or equal to A.
fix：朝零方向舍入
B = fix(A) rounds the elements of A toward zero, resulting in an array of integers.
round：四舍五入
B = round(A) rounds the elements of X to the nearest integers.
norm：求矩阵或向量的泛数
x = [1 2 3 4 5 6];
norm(x) = 9.5394
Example：
a= [-0.9,-2.1,-0.4,0.3,0.8,1.1,2.7,-1.2+2.9i];
floor(a)=[ -1,-3,-1,0,0,1,2, -2+2i]
ceil(a)= [ 0, -2, 0,1,1,2,3, -1+3i]
fix(a)=[ 0, -2, 0,0,0,1,2, -1+2i]
round(a)=[-1, -2, 0,0,1,1,3, -1+3i]
注：For complex X, for all the four fuctions the imaginary and real parts are rounded independently.
           

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