matlab里面的取整函数fixroundfloor

matlab里面的取整函数fixroundfloor

1.fix-向零方向取整。

fixRoundtowardszero.

fix(X)roundstheelementsofXtothenearestintegers

towardszero.

2.fix使用举例：

t=

7.68063.53883.61309.01508.17693.1781

2.33093.47197.41633.18349.81189.8445

5.87362.53727.05905.97088.61995.4825

4.58979.52537.00892.97800.83827.4925

8.60982.98200.06231.25013.7718.4185

6.0841.58413.74353.88362.36131.6689

-----------------------------------------------------------------------

fix(t)

ans=

733983

237399

527585

497207

820138

613321

3.round-向最近的方向取整。

roundRoundtowardsnearestinteger.

round(X)roundstheelementsofXtothenearestintegers.

4.floor-向负无穷大方向取整：

floorRoundtowardsminusinfinity.

floor(X)roundstheelementsofXtothenearestintegers

towardsminusinfinity.

5.ceil-向正无穷大方向取整。

ceilRoundtowardsplusinfinity.

ceil(X)roundstheelementsofXtothenearestintegers

towardsinfinity.

6.mod-计算模数：

modModulusafterdivision.

mod(x,y)isx-n.*ywheren=floor(x./y)ify~=

0.Ifyisnotan

integerandthequotientx./yiswithinroundofferrorofaninteger,

thennisthatinteger.Theinputsxandymustberealarraysofthe

samesize,orrealscalars.

Thestatement"xandyarecongruentmodm"meansmod(x,m)==mod(y,m).

Byconvention:

mod(x,0)isx.

mod(x,x)is

0.

mod(x,y),forx~=yandy~=0,hasthesamesignasy.

Note:REM(x,y),forx~=yandy~=0,hasthesamesignasx.

mod(x,y)andREM(x,y)areequalifxandyhavethesamesign,but

differbyyifxandyhavedifferentsigns.