<html lang="en"> <head> <title>Numeric Objects - GNU Octave</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="GNU Octave"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="Built_002din-Data-Types.html#Built_002din-Data-Types" title="Built-in Data Types"> <link rel="next" href="Missing-Data.html#Missing-Data" title="Missing Data"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="Numeric-Objects"></a> <p> Next: <a rel="next" accesskey="n" href="Missing-Data.html#Missing-Data">Missing Data</a>, Up: <a rel="up" accesskey="u" href="Built_002din-Data-Types.html#Built_002din-Data-Types">Built-in Data Types</a> <hr> </div> <h4 class="subsection">3.1.1 Numeric Objects</h4> <p><a name="index-numeric-constant-210"></a><a name="index-numeric-value-211"></a> Octave's built-in numeric objects include real, complex, and integer scalars and matrices. All built-in floating point numeric data is currently stored as double precision numbers. On systems that use the IEEE floating point format, values in the range of approximately 2.2251e-308 to 1.7977e+308 can be stored, and the relative precision is approximately 2.2204e-16. The exact values are given by the variables <code>realmin</code>, <code>realmax</code>, and <code>eps</code>, respectively. <p>Matrix objects can be of any size, and can be dynamically reshaped and resized. It is easy to extract individual rows, columns, or submatrices using a variety of powerful indexing features. See <a href="Index-Expressions.html#Index-Expressions">Index Expressions</a>. <p>See <a href="Numeric-Data-Types.html#Numeric-Data-Types">Numeric Data Types</a>, for more information. </body></html>