FLOOR Round towards minus infinity. FLOOR(X) rounds the elements of X to the nearest integers towards minus infinity. CEIL Round towards plus infinity. CEIL(X) rounds the elements of X to the nearest integers towards infinity. FIX Round towards zero.…
转自http://blog.sina.com.cn/s/blog_48ebd4fb010009c2.html 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. ceil:朝正无穷方向舍入 B = ceil(A) rounds the elements of A to the nearest integers greater than…