crotg.f.html

来自「famous linear algebra library (LAPACK) p」· HTML 代码 · 共 56 行

HTML
56 行
字号 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <title>crotg.f</title>
 <meta name="generator" content="emacs 21.3.1; htmlfontify 0.20">
<style type="text/css"><!-- 
body { background: rgb(255, 255, 255);  color: rgb(0, 0, 0);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.default   { background: rgb(255, 255, 255);  color: rgb(0, 0, 0);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.default a { background: rgb(255, 255, 255);  color: rgb(0, 0, 0);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: underline; }
span.comment   { color: rgb(178, 34, 34);  background: rgb(255, 255, 255);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: none; }
span.comment a { color: rgb(178, 34, 34);  background: rgb(255, 255, 255);  font-style: normal;  font-weight: 500;  font-stretch: normal;  font-family: adobe-courier;  font-size: 11pt;  text-decoration: underline; }
 --></style>

 </head>
  <body>

<pre>
      SUBROUTINE <a name="CROTG.1"></a><a href="crotg.f.html#CROTG.1">CROTG</a>(CA,CB,C,S)
<span class="comment">*</span><span class="comment">     .. Scalar Arguments ..
</span>      COMPLEX CA,CB,S
      REAL C
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  Purpose
</span><span class="comment">*</span><span class="comment">  =======
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">  <a name="CROTG.10"></a><a href="crotg.f.html#CROTG.1">CROTG</a> determines a complex Givens rotation.
</span><span class="comment">*</span><span class="comment">
</span><span class="comment">*</span><span class="comment">     .. Local Scalars ..
</span>      COMPLEX ALPHA
      REAL NORM,SCALE
<span class="comment">*</span><span class="comment">     ..
</span><span class="comment">*</span><span class="comment">     .. Intrinsic Functions ..
</span>      INTRINSIC CABS,CONJG,SQRT
<span class="comment">*</span><span class="comment">     ..
</span>      IF (CABS(CA).NE.0.) GO TO 10
      C = 0.
      S = (1.,0.)
      CA = CB
      GO TO 20
   10 CONTINUE
      SCALE = CABS(CA) + CABS(CB)
      NORM = SCALE*SQRT((CABS(CA/SCALE))**2+ (CABS(CB/SCALE))**2)
      ALPHA = CA/CABS(CA)
      C = CABS(CA)/NORM
      S = ALPHA*CONJG(CB)/NORM
      CA = ALPHA*NORM
   20 CONTINUE
      RETURN
      END

</pre>

 </body>
</html>

crotg.f.html - 源码说明

本页面展示了「famous linear algebra library (LAPACK) ports to windows」中的 crotg.f.html 源码文件，采用 HTML 编程语言编写，共 56 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与algebra相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?