Mercurial > hg > ltpda

view m-toolbox/html_help/help/ug/constructor_examples_specwin.html @ 30:317b5f447f3e database-connection-manager

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update workspaceBrowser
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
parents f0afece42f48
children
line wrap: on
line source

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">

<html lang="en">
<head>
  <meta name="generator" content=
  "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
  <meta http-equiv="Content-Type" content=
  "text/html; charset=us-ascii">

  <title>Constructor examples of the SPECWIN class (LTPDA Toolbox)</title>
  <link rel="stylesheet" href="docstyle.css" type="text/css">
  <meta name="generator" content="DocBook XSL Stylesheets V1.52.2">
  <meta name="description" content=
  "Presents an overview of the features, system requirements, and starting the toolbox.">
  </head>

<body>
  <a name="top_of_page" id="top_of_page"></a>

  <p style="font-size:1px;">&nbsp;</p>

  <table class="nav" summary="Navigation aid" border="0" width=
  "100%" cellpadding="0" cellspacing="0">
    <tr>
      <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>

      <td valign="baseline" align="right"><a href=
      "constructor_examples_plist.html"><img src="b_prev.gif" border="0" align=
      "bottom" alt="Constructor examples of the PLIST class"></a>&nbsp;&nbsp;&nbsp;<a href=
      "bycategory.html"><img src="b_next.gif" border="0" align=
      "bottom" alt="Functions - By Category"></a></td>
    </tr>
  </table>

  <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Constructor examples of the SPECWIN class</h1>
  <hr>
  
  <p>
	
<!-- -------------------------------------------------- -->
<!-- --------------- BEGIN CONTENT FILE --------------- -->
<!-- -------------------------------------------------- -->

<table border="0" summary="Simple list" class="simplelist_nottable_last">
  <tr>
    <td>
      <a href="constructor_examples_specwin.html#empty">Construct empty SPECWIN object</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_specwin.html#xml_file">Construct a SPECWIN object by loading the object from a file</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_specwin.html#particular">Construct a SPECWIN of a particular window type an length</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_specwin.html#kaiser">Construct a SPECWIN Kaiser window with the prescribed psll</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_specwin.html#plist">Construct a SPECWIN object from a parameter list (PLIST) object</a>
    </td>
  </tr>
</table>

<!-- --------------- NEXT EXAMPLE --------------- -->

<hr>
<h2 class="title"><a href="gui_specwin.html">For help in designing a SPECWIN object, see also the Spectral Window GUI documentation</a></h2>
<hr />
<h2 class="title"></h2>
<h2 class="title"><a name="empty"></a>Construct empty SPECWIN object</h2>
<p>The following example creates an empty specwin object</p>
<div class="fragment"><pre class="programlisting">
w = specwin()
-------- None ------------

   alpha: -1
    psll: -1
     rov: -1
   nenbw: -1
    w3db: -1
flatness: -1
      ws: -1
     ws2: -1
     win: 1

--------------------------
</pre></div>

<!-- --------------- NEXT EXAMPLE --------------- -->

<hr>
<h2 class="title"><a name="xml_file"></a>Construct a SPECWIN object by loading the object from a file</h2>
<p>The following example creates a new specwin object by loading the specwin object from disk.</p>
<div class="fragment"><pre class="programlisting">
p = specwin(<span class="string">'specwin.mat'</span>)
p = specwin(<span class="string">'specwin.xml'</span>)
</pre></div>

<!-- --------------- NEXT EXAMPLE --------------- -->

<hr>
<h2 class="title"><a name="particular"></a>Construct a SPECWIN of a particular window type an length</h2>
  <p>To create a spectral window object, you call the <tt>specwin</tt> class constructor. The following
	code fragment creates a 100-point Hanning window:
  </p>
  <div class="fragment"><pre>
	>> w = specwin(<span class="string">'Hanning'</span>, 100)
	-------- Hanning ------------

	   alpha: 0
	    psll: 31.5
	     rov: 50
	   nenbw: 1.5
	    w3db: 1.4382
	flatness: -1.4236
	      ws: 50
	     ws2: 37.5
	     win: 100

	-----------------------------
	</pre></div>
  <p><a href="specwin_description.html">List of available window functions</a></p>

<!-- --------------- NEXT EXAMPLE --------------- -->

<hr>
<h2 class="title"><a name="kaiser"></a>Construct a SPECWIN Kaiser window with the prescribed psll</h2>
  <p>In the special case of creating a Kaiser window, the additional input parameter, PSLL, must be supplied. For example, the following code creates a 100-point Kaiser window with -150dB peak side-lobe level:</p>
  <div class="fragment"><pre>
	>> w = specwin(<span class="string">'Kaiser'</span>, 100, 150)
	-------- Kaiser ------------

	   alpha: 6.18029
	    psll: 150
	     rov: 73.3738
	   nenbw: 2.52989
	    w3db: 2.38506
	flatness: -0.52279
	      ws: 28.2558
	     ws2: 20.1819
	     win: 100

	----------------------------
	</pre></div>

<!-- --------------- NEXT EXAMPLE --------------- -->

<hr>
<h2 class="title"><a name="plist"></a>Construct a SPECWIN object from a parameter list (PLIST) object</h2>
<p>Construct a SPECWIN from its definion.
  <table border="0" summary="Simple list" class="simplelist_nottable_last" width="50%">
    <tr valign="top">
      <td width="25%">
        <p>'Name'</p>
      </td>
      <td width="75%">
        <p>Spectral window name [default: 'Kaiser']</p>
      </td>
    </tr>
    <tr valign="top">
      <td width="25%">
        <p>'N'</p>
      </td>
      <td width="75%">
        <p>Spectral window length [default: 10]</p>
      </td>
    </tr>
    <tr valign="top">
      <td width="25%">
        <p>'PSLL'</p>
      </td>
      <td width="75%">
        <p>Peak sidelobe length (only for Kaiser type)<br />[default: 150]</p>
      </td>
    </tr>
  </table>
</p>
<div class="fragment"><pre class="programlisting">
pl = plist(<span class="string">'Name'</span>, <span class="string">'Kaiser'</span>, <span class="string">'N'</span>, 1000, <span class="string">'PSLL'</span>, 75);

w = specwin(pl)
-------- Kaiser ------------

   alpha: 3.21394
    psll: 75
     rov: 63.4095
   nenbw: 1.85055
    w3db: 1.75392
flatness: -0.963765
      ws: 389.305
     ws2: 280.892
     win: 1000

----------------------------
</pre></div>
<div class="fragment"><pre class="programlisting">
pl = plist(<span class="string">'Name'</span>, <span class="string">'Hanning'</span>, <span class="string">'N'</span>, 1000);

w =specwin(pl)
-------- Hanning ------------

   alpha: 0
    psll: 31.5
     rov: 50
   nenbw: 1.5
    w3db: 1.4382
flatness: -1.4236
      ws: 500
     ws2: 375
     win: 1000

-----------------------------
</pre></div>













  </p>

  <br>
  <br>
  <table class="nav" summary="Navigation aid" border="0" width=
  "100%" cellpadding="0" cellspacing="0">
    <tr valign="top">
      <td align="left" width="20"><a href="constructor_examples_plist.html"><img src=
      "b_prev.gif" border="0" align="bottom" alt=
      "Constructor examples of the PLIST class"></a>&nbsp;</td>

      <td align="left">Constructor examples of the PLIST class</td>

      <td>&nbsp;</td>

      <td align="right">Functions - By Category</td>

      <td align="right" width="20"><a href=
      "bycategory.html"><img src="b_next.gif" border="0" align=
      "bottom" alt="Functions - By Category"></a></td>
    </tr>
  </table><br>

  <p class="copy">&copy;LTP Team</p>
</body>
</html>