matlab向上取整和向下取整，matlab定义取整函数

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1、 修正-四舍五入到零。

2、 fix Round towards zero.

3、 fix(X) rounds the elements of X to the nearest integers

4、 towards zero.

5、 使用fix的示例：

6、 t=

7、 7.6806 3.5388 3.6130 9.0150 8.1769 3.1781

8、 2.3309 3.4719 7.4163 3.1834 9.8118 9.8445

9、 5.8736 2.5372 7.0590 5.9708 8.6199 5.4825

10、 4.5897 9.5253 7.0089 2.9780 0.8382 7.4925

11、 8.6098 2.9820 0.0623 1.2501 3.3771 8.4185

12、 6.6084 1.5841 3.7435 3.8836 2.3613 1.6689

13、 -----------------------------------------------------------------------

14、 fix(t)

15、 ans=

16、 7 3 3 9 8 3

17、 2 3 7 3 9 9

18、 5 2 7 5 8 5

19、 4 9 7 2 0 7

20、 8 2 0 1 3 8

21、 6 1 3 3 2 1

22、 绕到最近的方向。

23、 round Round towards nearest integer.

24、 round(X) rounds the elements of X to the nearest integers.

25、 地板-四舍五入至负无穷大：

26、 floor Round towards minus infinity.

27、 floor(X) rounds the elements of X to the nearest integers

28、 towards minus infinity.

29、 舍入到正无穷大。

30、 ceil Round towards plus infinity.

31、 ceil(X) rounds the elements of X to the nearest integers

32、 towards infinity.

33、 Mod-计算模数：

34、 mod Modulus after division.

35、 mod(x,y) is x - n.*y where n=floor(x./y) if y ~=0. If y is not an

36、 integer and the quotient x./y is within roundoff error of an integer,

37、 then n is that integer. The inputs x and y must be real arrays of the

38、 same size, or real scalars.

39、 The statement 'x and y are congruent mod m' means mod(x,m)==mod(y,m).

40、 By convention:

41、 mod(x,0) is x.

42、 mod(x,x) is 0.

43、 mod(x,y), for x~=y and y~=0, has the same sign as y.

44、 Note: REM(x,y), for x~=y and y~=0, has the same sign as x.

45、 mod(x,y) and REM(x,y) are equal if x and y have the same sign, but

46、 differ by y if x and y have different signs.

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