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📄 matlab3.htm

📁 经典的matlab入门指导手册
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<DIV class=Section1 style="LAYOUT-GRID:  15.6pt none">
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><B 
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US 
style="FONT-SIZE: 22pt; COLOR: black; mso-bidi-font-size: 10.0pt">MATLAB</SPAN></B><B 
style="mso-bidi-font-weight: normal"><SPAN 
style="FONT-SIZE: 22pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">入门教程</SPAN></B><B 
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US 
style="FONT-SIZE: 22pt; COLOR: black; mso-bidi-font-size: 10.0pt"><O:P></O:P></SPAN></B></P>
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><B 
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US 
style="FONT-SIZE: 16pt; COLOR: blue; mso-bidi-font-size: 10.0pt">3.</SPAN></B><B 
style="mso-bidi-font-weight: normal"><SPAN 
style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基本</SPAN></B><B 
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US 
style="FONT-SIZE: 16pt; COLOR: blue; mso-bidi-font-size: 10.0pt">xy</SPAN></B><B 
style="mso-bidi-font-weight: normal"><SPAN 
style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">平面绘图命令</SPAN></B><B 
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US 
style="FONT-SIZE: 16pt; COLOR: blue; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></B></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>MATLAB</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">不但擅长於矩阵相关的数值运算，也适合用在各种科学目视表示（</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">Scientific 
visualization</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）。</SPAN><SPAN 
lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本节将介绍</SPAN><SPAN 
lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">MATLAB</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基本</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">xy</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">平面及</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">xyz</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">空间的各项绘图命令，包含一维曲线及二维曲面的绘制、列印及存档。</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN><B 
style="mso-bidi-font-weight: normal"><SPAN 
style="COLOR: red">plot</SPAN></B></SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是绘制一维曲线的基本函数，但在使用此函数之前，我们需先定义曲线上每一点的</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">x </SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">及</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">座标。</SPAN><SPAN 
lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">下例可画出一条正弦曲线：</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">close all; 
<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">x=linspace(0, 2*pi, 100); % 
100</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个点的</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">x</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">座标</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y=sin(x); % </SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">对应的</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">座标</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">plot(x,y);<SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-ignore: vglayout">
<TABLE cellSpacing=0 cellPadding=0 align=left>
  <TBODY>
  <TR>
    <TD width=0 height=10></TD></TR>
  <TR>
    <TD></TD>
    <TD><IMG height=213 src="matlab3.files/image006.gif" width=284 
      v:shapes="_x0000_s1027"></TD></TR></TBODY></TABLE></SPAN><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><O:P></O:P></SPAN>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">小整理：</SPAN><SPAN 
lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">MATLAB</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基本绘图函数</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"> 
<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">plot: x</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴和</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴均为线性刻度（</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">Linear 
scale</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"> 
<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">loglog: x</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴和</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴均为对数刻度（</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">Logarithmic 
scale</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"> 
<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">semilogx: x</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴为对数刻度，</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴为线性刻度</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"> 
<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">semilogy: x</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴为线性刻度，</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">y</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">轴为对数刻度</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">若要画出多条曲线，只需将座标对依次放入</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">plot</SPAN><SPAN 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函数即可：</SPAN><SPAN 
lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><!--[if gte vml 1]><V:SHAPE id=_x0000_s1028 
style="MARGIN-TOP: 7.8pt; Z-INDEX: 2; LEFT: 0px; MARGIN-LEFT: 2in; WIDTH: 204.05pt; POSITION: absolute; HEIGHT: 153.05pt; TEXT-ALIGN: left; mso-position-horizontal-relative: text; mso-position-vertical-relative: text" 
o:allowincell="f" type="#_x0000_t75"><V:IMAGEDATA o:title="" 
src="./MATLAB入门教程.files/image007.emz" /></V:SHAPE><![endif]--><![if !vml]><span style='mso-ignore:vglayout;position:
absolute;z-index:3;left:0px;margin-left:192px;margin-top:10px;width:272px;
height:204px'></span><![endif]><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt">plot(x, sin(x), x, 
cos(x));<SPAN style="mso-spacerun: yes">&nbsp;&nbsp; 
</SPAN><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><SPAN 
style="mso-spacerun: yes">&nbsp;</SPAN><O:P><IMG height=204 
src="matlab3.files/image008.gif" width=272 
v:shapes="_x0000_s1028"></O:P></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
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