1、floor函数：朝负无穷大方向取整
2、用法说明：
y = floor(x) 函数将x中元素取整，值y为不大于本身的最小整数。对于复数，分别对实部和虚部取整
3、用法举例
>> x = [3+4i 6-7i 9+11i 1-4i 3.4-4.5i 90.67-123i]
x =
1.0e+02 *
Columns 1 through 5
0.0300 + 0.0400i 0.0600 - 0.0700i 0.0900 + 0.1100i 0.0100 - 0.0400i 0.0340 - 0.0450i
Column 6
0.9067 - 1.2300i
>> y = floor(x)
y =
1.0e+02 *
Columns 1 through 5
0.0300 + 0.0400i 0.0600 - 0.0700i 0.0900 + 0.1100i 0.0100 - 0.0400i 0.0300 - 0.0500i
Column 6
0.9000 - 1.2300i
4、附录
>> help floor
floor Round towards minus infinity.
floor(X) rounds the elements of X to the nearest integers
towards minus infinity.
See also round, ceil, fix.
Overloaded methods:
codistributed/floor
gpuArray/floor
Reference page in Help browser
doc floor