matlab中ceil

Y = ceil(X) rounds each element of X to the nearest integer greater than or equal to that element.

example

Y = ceil(t) rounds each element of the duration array t to the nearest number of seconds greater than or equal to that element.

example

Y = ceil(t,unit) rounds each element of t to the nearest number of the specified unit of time greater than or equal to that element.

 

X = [-1.9 -0.2 3.4; 5.6 7 2.4+3.6i];
Y = ceil(X)

 

Y =

  -1.0000 + 0.0000i   0.0000 + 0.0000i   4.0000 + 0.0000i
   6.0000 + 0.0000i   7.0000 + 0.0000i   3.0000 + 4.0000i

 

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