メイン disc.html Last modified: Sep 01, 2009
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;CHARSET=EUC-JP">
<link rel="shortcut icon" href="../favicon.ico">
<title>JavaScript</title>
<script src="inv.js">document.write("inv.js ファイルが見つかりません??<br>")</script>
<script src="io.js">document.write("io.js ファイルが見つかりません??<br>")</script>
<script language="JavaScript">
<!--
var epsinv = 1e-8
function zfi(w, i)
{
var ww = (""+i).length
ww = ww > w ? 0 : w-ww
return "000000000000000".substring(0, ww)+i
}
function vname(i)
{
return "Var"+zfi(2, i+1)
}
function calc(data_string)
{
var data, nc, nv, n, g, i, j, k, temp2, constant, signum, pred, res, mark
var mean, s, v, a, result, diff
if ((data = getdata(data_string, 0)) == false) return
nc = data.length
nv = data[0].length-1
if (nc < 2) {
printf("ケース数が1以下です\n")
return
}
mean = makeMatrix(2,nv)
diff = new Array(nv)
a = new Array(nv)
s = makeMatrix(nv, nv)
result = makeMatrix(2,2)
n = new Array(2)
// Netscape communicator のバグ?配列ベクトルは初期化されていない
n[0] = n[1] = 0
for (i = 0; i < nv; i++) {
mean[0][i] = mean[1][i] = 0
for (j = 0; j < nv; j++) {
s[i][j] = 0
}
}
result[0][0] = result[0][1] = result[1][0] = result[1][1] = 0
for (i = 0; i < nc; i++) {
g = data[i][nv] == 1 ? 0 : 1
n[g]++
for (j = 0; j < nv; j++) {
mean[g][j] += data[i][j]
}
}
for (j = 0; j < nv; j++) {
for (i = 0; i < 2; i++) {
mean[i][j] /= n[i]
}
diff[j] = mean[0][j]-mean[1][j]
}
for (i = 0; i < nc; i++) {
g = data[i][nv] == 1 ? 0 : 1
for (j = 0; j < nv; j++) {
for (k = 0; k < nv; k++) {
s[j][k] += (mean[g][j]-data[i][j])*(mean[g][k]-data[i][k])
}
}
}
g = n[0]+n[1]-2
for (i = 0; i < nv; i++) {
for (j = 0; j < nv; j++) {
s[i][j] /= g
}
}
printf("★ 判別分析 ★\n\n")
printf("有効データ組数 = %i\n\n", nc)
printf("第 1 群データ組数 = %i\n", n[0])
printf("第 2 群データ組数 = %i\n", n[1])
printf("\n各群の平均値\n\n%5s%15s%15s\n", "変数", "第 1 群", "第 2 群")
for (j = 0; j < nv; j++) {
printf("%5s%15.7g%15.7g\n", vname(j), mean[0][j], mean[1][j])
}
if (inv(s, nv, epsinv) == 0) {
for (i = 0; i < nv; i++) {
temp2 = 0
for (j = 0; j < nv; j++) {
temp2 += s[i][j]*diff[j]
}
a[i] = temp2
}
constant = signum = 0
for (j = 0; j < nv; j++) {
constant -= (mean[0][j]+mean[1][j])*a[j]*0.5
signum += mean[0][j]*a[j]
}
signum += constant
printf("\n判別関数\n\n%6s%15s\n", "変数", "判別係数")
for (i = 0; i < nv; i++) {
printf("%6s%15.7g\n", vname(i), a[i])
}
printf("%6s%15.7g\n", "定数項", constant)
printf("\n判別結果\n\n%5s %10s %12s %12s %s\n", "番号", "実際の群", "予測された群", "判別係数", "判別結果")
for (i = 0; i < nc; i++) {
g = data[i][nv] == 1 ? 0 : 1
pred = constant
for (j = 0; j < nv; j++) {
pred += a[j]*data[i][j]
}
if (signum > 0) {
res = pred >= 0 ? 0 : 1
}
else {
res = pred >= 0 ? 1 : 0
}
result[g][res]++
mark = g == res ? " " : "誤判別"
printf("%5i %10i %12i %12.6f %6s\n", i+1, data[i][nv], res+1, pred, mark)
}
printf("\n判別結果総括表\n\n 予測された群\n")
printf(" %13s %13s %8s\n", "第 1 群", "第 2 群", "合計")
printf("実際は第 1 群 %5i(%5.1f%%) %5i(%5.1f%%) %8i\n", result[0][0], result[0][0]/n[0]*100, result[0][1], result[0][1]/n[0]*100, n[0])
printf("実際は第 2 群 %5i(%5.1f%%) %5i(%5.1f%%) %8i\n", result[1][0], result[1][0]/n[1]*100, result[1][1], result[1][1]/n[1]*100, n[1])
printf("\n正判別率 = (%i+%i) / %i = %.1f%%\n", result[0][0], result[1][1], nc, (result[0][0]+result[1][1])/nc*100)
}
}
//-->
</script>
</head>
<body bgcolor="#ffffff">
<font size="+2"><b>二群の判別分析</b></font> <a href="src/disc.html"><img src="png/src.png" width=35 height=11 alt="src" align=top></a> Last modified: Jun 01, 2006<hr noshade><p>
<font color="#ff0000" size="+2">以下のプログラムのサポートは終了しました。自己責任でお使い下さい。</font>
<form name=Result>
<script language="JavaScript">
<!--
//-->JavaScript がサポートされていないブラウザですか?
</script>
二群の判別分析を行う(3 群以上の判別をする場合は,<a href="../BlackBox/BlackBox.html">CGI(C)</a>,<a href="../lecture/stats-by-excel/vba/html/sdis.html">Excel VBA</a> によるプログラムを使用すること)。<br>
<img src="../gra/button3.png" width=9 height=9 alt="・"> <a href="../lecture/Discriminant/index.html">手法の解説</a> <img src="../gra/button3.png" width=9 height=9 alt="・"> <a href="exa/disc.html">使用法</a>
<hr>
<table><tr>
<td><input type="button" name="calcurate" value="計算開始" onClick="calc(this.form.data.value)"> </td>
<td><input type="button" name="clear" value="入力欄クリア" onClick="this.form.data.value=''"> </td>
<td><input type="button" name="clear" value="出力欄クリア" onClick="this.form.result.value=''"></td>
</tr></table>
<p>
入力欄<br><textarea name="data" ROWS=20 COLS=80></textarea><p>
出力欄<br><textarea name="result" ROWS=30 COLS=80></textarea>
</form>
<p><hr noshade>
<img src="../gra/button3.png" width=9 height=9 alt="・"> <A HREF="javascript:history.go(-1)">直前のページへ戻る</A> <img src="../gra/button3.png" width=9 height=9 alt="・"> <a href="../mail.html">E-mail to Shigenobu AOKI</a>
<p><IMG SRC="../gra/ume5.png" width=121 height=37 ALT="Made with Macintosh">
</body>
</html>
サブ inv.js Last modified: Mar 25, 2004
サブ io.js Last modified: Mar 25, 2004
直前のページへ戻る E-mail to Shigenobu AOKI