(octave.info)Single Precision Data Types

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4.3 Single Precision Data Types
===============================

Octave includes support for single precision data types, and most of the
functions in Octave accept single precision values and return single
precision answers.  A single precision variable is created with the
‘single’ function.

 -- : single (X)
     Convert X to single precision type.

     See also: Note: double.

   for example:

     sngl = single (rand (2, 2))
          ⇒ sngl =
             0.37569   0.92982
             0.11962   0.50876
     class (sngl)
         ⇒ single

   Many functions can also return single precision values directly.  For
example

     ones (2, 2, "single")
     zeros (2, 2, "single")
     eye (2, 2,  "single")
     rand (2, 2, "single")
     NaN (2, 2, "single")
     NA (2, 2, "single")
     Inf (2, 2, "single")

will all return single precision matrices.