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demo1instr.html
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demo1instr.html
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<!DOCTYPE html>
<HTML lang="en">
<HEAD>
<TITLE>More information about first SOM demo</TITLE>
<link rel="stylesheet" href="style.css">
</HEAD>
<BODY>
<h1>More information about first SOM demo</h1>
<img src="images/SOMDemo1s.gif" align=left hspace=4 alt="[image of applet]">
<a name="control"></a>
On the top there is <strong>the control panel</strong>. To start the
automatic teaching press the <b>START</b> button, and to stop, press
it again (it should read <b>STOP</b> while automatic teaching is in
progress). The <b>RANDOMIZE</b> button will initialize the map to
random values. The text field at the right end of the control panel
is used to set the <i>alpha</i> parameter (the learning rate). Enter
the new value and press return to set <i>alpha</i>. <p>
<a name="input"></a>
<strong>Input controller:</strong> The leftmost slider (with pink
background) is the input controller. It displays the input value used to
teach the map on its right. Change the position of the slider with
the mouse (click on desired position or drag the slider) to teach one
step with the value of your choice.<p>
<a name="map"></a>
<strong>The map</strong> contains five map units represented by
vertical sliders. The position of the slider indicates the value
stored in the unit. The sliders are controlled by the SOM algorithm.
At each step during teaching, the sliders are moved to show the new
values. The yellow area shows the difference compared to the previous
value of the unit. The slider whose value is closest to the input
value (i.e. corresponding to the best-matching map unit) is indicated
with red colour. The values of the units can be changes with the
mouse.<p>
<a name="keys"></a>
<strong>Keys:</strong> Press the <b>SPACEBAR KEY</b> on the keyboard
to teach one step with a random vector. Use the <b>CURSOR UP/DOWN</b>
keys to speed up/slow down the speed of automatic teaching.
<br clear=left><p>
<footer>
<div>
*
<a href="index.html"><strong>Demo Index</strong></a>
*
<a href="http://www.cis.hut.fi/nnrc/index.html"><strong>Neural Networks Research Centre</strong></a>
*
</div>
<div>
<!-- hhmts start -->
Last modified: Wed Sep 29 18:05:00 1999
<!-- hhmts end -->
</div>
</footer>
</body></html>