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toubyte

Converts values of any snumeric data type or string to values of type unsigned byte.

Available in version 6.0.0 and later.

Prototype

	function toubyte (
		input_val  : snumeric data type or string   
	)

	return_val [dimsizes(input_val)] :  unsigned byte

Arguments

input_val

A variable of any snumeric data type or string of any dimension.

Return value

Returns unsigned bytes. If the input variable is float or double, then any fractional part of the input values is truncated. The dimensionality of the output matches that of the input.

Any input value that is out of range for a unsigned byte will be returned as a missing value.

Description

This function converts any snumeric data or string to unsigned byte values. If the input is float or double, then the fractional part is truncated.

Any input value that is out of range for a unsigned byte will be returned as a missing value.

Attributes, with the exception of _FillValue, are not propagated by the conversion functions.

Special considerations apply to how missing values and out-of-range values are handled in the conversion functions. For this function an out-of-range value could be valid in its original type, but not in the valid range of a unsigned byte. An out-of-range value is converted to a missing value, but what that missing value is depends on the circumstances of the particular conversion being performed. For example, determination has to be made whether a missing value for a variable to be converted is in the range of the type of the target variable.

Examples

Example 1

Convert a byte to an unsigned byte:

  b = 64b
  B = toubyte(b)
  print(B)

Output:

Variable: B
Type: ubyte
Total Size: 1 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes:   [1]
Coordinates: 
(0)     64

Example 2

Convert an integer array to an unsigned byte, with some of the values being too large for a ubyte:

  iarr = ispan(250,260,1)
  Barr = toubyte(iarr)
  print(Barr)