📄 6_1.htm
字号:
<html>
<head>
<title>for循环语句</title>
</head>
<body lang=ZH-CN link=blue vlink=purple style='tab-interval:21.0pt;text-justify-trim:
punctuation'>
<div class=Section1 style='layout-grid:15.6pt'>
<p class=MsoNormal align=center style='text-align:center'><b><span lang=EN-US
style='font-size:26.0pt;mso-bidi-font-size:12.0pt;color:blue'>for</span></b><b><span
style='font-size:26.0pt;mso-bidi-font-size:12.0pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman";color:blue'>循环语句</span></b><b><span
lang=EN-US style='font-size:26.0pt;mso-bidi-font-size:12.0pt;color:blue'><o:p></o:p></span></b></p>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US
style='mso-font-kerning:0pt'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal align=center style='text-align:center'><span lang=EN-US
style='mso-font-kerning:0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>For</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>循环允许一组命令以固定的和预定的次数重复。</span><span
lang=EN-US>For</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>循环的一般形式是：</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:63.0pt;text-indent:-63.0pt;mso-char-indent-count:
-6.0;mso-char-indent-size:10.5pt;mso-char-indent-size:10.5pt'><span lang=EN-US><span
style='mso-tab-count:4'> </span></span><span
lang=EN-US style='font-size:10.0pt'>for </span><span style='font-size:10.0pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>变数</span><span lang=EN-US style='font-size:10.0pt'> = </span><span
style='font-size:10.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>矩阵；</span><span lang=EN-US
style='font-size:10.0pt'> <br>
</span><span style='font-size:10.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>运算式；</span><span lang=EN-US
style='font-size:10.0pt'> <br>
end</span></p>
<p class=MsoNormal align=left style='text-align:left'><span style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>在</span><span
lang=EN-US>for</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>和</span><span lang=EN-US>end</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>语句之间的</span><span style='mso-bidi-font-size:10.0pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>运算式</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>按数组中的每一列执行一次。在每一次迭代中，</span><span
lang=EN-US>x</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>被指定为数组的下一列，即在第</span><span lang=EN-US>n</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>次循环中，</span><span lang=EN-US>x=array(:, n)</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>。</span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'>?n=0:1:10;<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'>?y=n;<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'>?for i=1:11<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'><span style="mso-spacerun: yes"> </span>y(i)=sin(n(i));<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'>end<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'>?y<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'><span style="mso-spacerun: yes"> </span>Columns 1
through 7 <o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'><span style="mso-spacerun:
yes"> </span>0<span
style="mso-spacerun: yes"> </span>0.8415<span
style="mso-spacerun: yes"> </span>0.9093<span
style="mso-spacerun: yes"> </span>0.1411<span
style="mso-spacerun: yes"> </span>-0.7568<span style="mso-spacerun:
yes"> </span>-0.9589<span style="mso-spacerun: yes">
</span>-0.2794<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left'><span lang=EN-US
style='color:blue'><span style="mso-spacerun: yes"> </span>Columns 8
through 11 <o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-indent:21.0pt'><span
lang=EN-US style='color:blue'>0.6570<span style="mso-spacerun:
yes"> </span>0.9894<span style="mso-spacerun:
yes"> </span>0.4121<span style="mso-spacerun:
yes"> </span>-0.5440</span></p>
<p class=MsoNormal align=left style='margin-left:42.0pt;text-align:left;
text-indent:-21.0pt;mso-list:l0 level1 lfo2;tab-stops:list 42.0pt'> <span
lang=EN-US style='font-family:Wingdings'>l<span style='font:7.0pt "Times New Roman"'>
</span></span><span lang=EN-US style='color:red'>For</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>循环不能用</span><span lang=EN-US style='color:red'>For</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>循环内重新赋值循环变量</span><b style='mso-bidi-font-weight:normal'><span
lang=EN-US style='color:red'>n</span></b><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>来终止。</span></p>
<p class=MsoNormal style='margin-left:42.0pt;text-indent:-21.0pt;mso-list:l0 level1 lfo2;
tab-stops:list 42.0pt'><span lang=EN-US style='font-family:
Wingdings'>l<span style='font:7.0pt "Times New Roman"'>
</span></span> <span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>在</span><span lang=EN-US
style='color:red'>For</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>循环内接受任何有效的</span><span
lang=EN-US>MATLAB</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>数组。</span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>?a=1;<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>?for i=n<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y=sin(n(a))<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a=a+1<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>end<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>0<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>2<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>0.8415<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>3<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>0.9093<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span><span
style="mso-spacerun: yes"> </span>4<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>0.1411<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>5<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>-0.7568<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>6<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>y =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>-0.9589<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'>a =<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:4.0gd'><span lang=EN-US style='color:
blue'><span style="mso-spacerun: yes"> </span>7<o:p></o:p></span></p>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -