FreeMat: CEIL Ceiling Function

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CEIL Ceiling Function

Section: Elementary Functions

# Usage

Computes the ceiling of an n-dimensional array elementwise. The ceiling of a number is defined as the smallest integer that is larger than or equal to that number. The general syntax for its use is

       y = ceil(x)

where `x` is a multidimensional array of numerical type. The `ceil` function preserves the type of the argument. So integer arguments are not modified, and `float` arrays return `float` arrays as outputs, and similarly for `double` arrays. The `ceil` function is not defined for `complex` or `dcomplex` types.

# Example

The following demonstrates the `ceil` function applied to various (numerical) arguments. For integer arguments, the ceil function has no effect:

    --> ceil(3)

    ans =
     3

    --> ceil(-3)

    ans =
     -3

Next, we take the `ceil` of a floating point value:

    --> ceil(float(3.023))

    ans =
     4

    --> ceil(float(-2.341))

    ans =
     -2

Note that the return type is a `float` also. Finally, for a `double` type:

    --> ceil(4.312)

    ans =
     5

    --> ceil(-5.32)

    ans =
     -5