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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<TITLE>ZEROS Array of Zeros
</TITLE>
</HEAD>
<BODY>
<H2>ZEROS Array of Zeros
</H2>
<P>
Section: <A HREF=sec_array.html> Array Generation and Manipulations </A>
<H3>Usage</H3>
Creates an array of zeros of the specified size. Two seperate
syntaxes are possible. The first syntax specifies the array
dimensions as a sequence of scalar dimensions:
<PRE>
y = zeros(d1,d2,...,dn).
</PRE>
<P>
The resulting array has the given dimensions, and is filled with
all zeros. The type of <code>y</code> is <code>double</code>, a 64-bit floating
point array. To get arrays of other types, use the typecast
functions (e.g., <code>uint8</code>, <code>int8</code>, etc.). An alternative syntax
is to use the following notation:
<PRE>
y = zeros(d1,d2,...,dn,classname)
</PRE>
<P>
where <code>classname</code> is one of 'double', 'single', 'int8', 'uint8',
'int16', 'uint16', 'int32', 'uint32', 'int64', 'uint64', 'float', 'logical'.
The second syntax specifies the array dimensions as a vector,
where each element in the vector specifies a dimension length:
<PRE>
y = zeros([d1,d2,...,dn]),
</PRE>
<P>
or
<PRE>
y = zeros([d1,d2,...,dn],classname).
</PRE>
<P>
This syntax is more convenient for calling <code>zeros</code> using a
variable for the argument. In both cases, specifying only one
dimension results in a square matrix output.
<H3>Example</H3>
The following examples demonstrate generation of some zero arrays
using the first form.
<PRE>
--> zeros(2,3,2)
ans =
(:,:,1) =
0 0 0
0 0 0
(:,:,2) =
0 0 0
0 0 0
--> zeros(1,3)
ans =
0 0 0
</PRE>
<P>
The same expressions, using the second form.
<PRE>
--> zeros([2,6])
ans =
0 0 0 0 0 0
0 0 0 0 0 0
--> zeros([1,3])
ans =
0 0 0
</PRE>
<P>
Finally, an example of using the type casting function <code>uint16</code> to generate an array of 16-bit unsigned integers with zero values.
<PRE>
--> uint16(zeros(3))
ans =
0 0 0
0 0 0
0 0 0
</PRE>
<P>
Here we use the second syntax where the class of the output is specified
explicitly
<PRE>
--> zeros(3,'int16')
ans =
0 0 0
0 0 0
0 0 0
</PRE>
<P>
</BODY>
</HTML>
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