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splot.htm
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Plotter</title>
<script src = "plot.js">
</script>
<link rel="stylesheet" href="s1.css">
<script>
plot=splot;
gv1id="n";
</script>
</head>
<body>
<select id="gt">
<option value="0">grid off</option>
<option value="1" selected>grid on</option>
<option value="2">fine grid</option>
<option value="-1">nothing</option>
</select>
<select id="spsx">
<option value="1" selected>left</option>
<option value="2">middle</option>
<option value="3">right</option>
<option value="4">manual</option>
</select>
<select id="spsy">
<option value="1">top</option>
<option value="2" selected>middle</option>
<option value="3">bottom</option>
<option value="4">manual</option>
</select>
<br><br><br>
<canvas id="canvas1" width="720" height="480"
style="border: 1px solid gray">
No canvas.
</canvas>
<div class="nb">
<input type="button" value="plot"
onclick="splot()">
<input type="button" value="<"
onclick="shiftam(); splot()">
<input type="button" value=">"
onclick="shiftap(); splot()">
<input type="button" value="<"
onclick="shiftbm(); splot()">
<input type="button" value=">"
onclick="shiftbp(); splot()">
 <span id="xy" class="mono"></span>
<br><br>
<table>
<tr><td style="text-align: right">
f(n) = <input type="text" id="inputf" style="width: 600px"
onkeyup="handle_keys(event);"><br>
g(n) = <input type="text" id="inputg" style="width: 600px"
onkeyup="handle_keys(event);"><br>
h(n) = <input type="text" id="inputh" style="width: 600px"
onkeyup="handle_keys(event);">
</td></tr>
</table>
<br>
<table>
<tr><td>
px = <input type="text" id="inputx" value="0"
onkeyup="handle_keys(event);"><br>
py = <input type="text" id="inputy" value="0"
onkeyup="handle_keys(event);"><br>
wx = <input type="text" id="inputwx" value="10"
onkeyup="handle_keys(event);"><br>
wy = <input type="text" id="inputwy" value="10"
onkeyup="handle_keys(event);"><br>
</td><td style="padding-left: 2em">
a = <input type="text" id="inputa" value="0"
onkeyup="handle_keys(event);"><br>
d = <input type="text" id="inputd" value="1"><br>
b = <input type="text" id="inputb" value="0"
onkeyup="handle_keys(event);"><br>
d = <input type="text" id="inputdb" value="1">
</td></tr>
</table>
<br>
n1 = <input type="text" id="inputn1" value="0"
onkeyup="handle_keys(event);"><br>
n2 = <input type="text" id="inputn2" value="100"
onkeyup="handle_keys(event);">
<br><br>
<a href="doc.htm" class="modest">help</a>
(<a href="doc-de.htm" class="modest">Hilfe</a>)
<br><br>
<input type="button" value="calc" onclick="calc()">
<input type="text" id="inputc" style="width:400px"
onkeyup="calc_keys(event);">
<br>
<p id="ans" class="mono">ans =</p>
<br><br>
<br>
</div>
</body>
</html>