📄 10.htm
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<title>M程序与M 函数</title>
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<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'>M</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'>程序与</span></b><b><span
lang=EN-US style='font-size:26.0pt;mso-bidi-font-size:12.0pt;color:blue'>M </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'>函数</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='font-size:12.0pt;font-family:宋体;mso-font-kerning:0pt'>
<hr size=2 width="100%" align=center>
</span></div>
<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'>M</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'>程序</span></b><span
lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-font-kerning:0pt'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:31.5pt'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>点击</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"'>指令窗工具条上的</span><span lang=EN-US>New File</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>图标</span><span lang=EN-US> <img width=20 height=20
src="./10/image002.jpg" v:shapes="_x0000_i1028"> </span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，就可打开如图所示的</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"'>文件编辑调试器</span><span lang=EN-US>MATLAB
Editor/Debugger</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。其窗口名为</span><span lang=EN-US>untitled
</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，用户即可在空白窗口中编写程序。</span><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>
<p class=MsoNormal align=center style='text-align:center'><span lang=EN-US>
<img width=554 height=415
src="./10/image004.jpg" v:shapes="_x0000_i1025"></span></p>
<p class=MsoNormal style='margin-left:3.0gd'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>输入如下一段程序</span><span
lang=EN-US>:</span></p>
<p class=MsoNormal style='margin-left:3.0gd'><b><span lang=EN-US
style='color:blue'>db.m<o:p></o:p></span></b></p>
<p class=MsoNormal align=left style='margin-left:3.0gd;text-align:left;
tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>t=-10:0.1:10;<o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:3.0gd;text-align:left;
tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>wc=10;<o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:3.0gd;text-align:left;
tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>ft=1/2*sin(t);<o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:3.0gd;text-align:left;
tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>ft1=ft.*cos(wc*t);d=0:length(ft)-1;<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:3.0gd'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>plot(d,ft1);</span><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New";color:blue;mso-font-kerning:0pt'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:31.5pt'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>完成了文件保存后，点击</span><span
lang=EN-US>Tool>>Run</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>或在工作间键入</span></p>
<p class=MsoNormal style='margin-left:3.0gd'><span lang=EN-US style='color:
blue'>db<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:3.0gd'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>运行结果如下：</span><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New";mso-font-kerning:
0pt'><o:p></o:p></span></p>
<p class=MsoNormal align=center style='margin-left:3.0gd;text-align:center'><span
lang=EN-US> <img width=554 height=415
src="./10/image006.jpg" v:shapes="_x0000_i1048"></span></p>
<p class=MsoNormal style='margin-left:3.0gd'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>在这里要注意一下，路径是否正确，这与程序的运行很重要的。点</span><span
lang=EN-US>File>>Set path…</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>将出现</span></p>
<p class=MsoNormal align=center style='margin-left:3.0gd;text-align:center'><span
lang=EN-US> <img width=554 height=415
src="10/image008.jpg" v:shapes="_x0000_i1049"> </span></p>
<p class=MsoNormal style='margin-left:3.0gd'><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>然后就可以修改路径了。</span></p>
<p class=MsoNormal align=center style='margin-left:31.5pt;text-align:center'><b><span
lang=EN-US style='font-size:26.0pt;mso-bidi-font-size:12.0pt;color:blue'>M </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'>函数</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>
<h3 style='margin-left:0cm;text-indent:0cm;mso-list:none;tab-stops:21.0pt'><span
lang=EN-US>M</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>文件的一般结构</span></h3>
<p class=MsoNormal><span lang=EN-US>M</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>函数文件示例：</span></p>
<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>function </span><span style='font-size:10.0pt;font-family:"Courier New";
mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>[M,m,df]=fftseq(m,ts,df)<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:forestgreen;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>%<span style="mso-spacerun: yes">
</span>[M,m,df]=Fftseq(m,ts,df)<o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:forestgreen;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>%<span style="mso-spacerun: yes">
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