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📄 ch7_1_2.htm

📁 matlab绘图教程
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<H1>
<FONT COLOR="#0000FF">7.1.2 &curren;G&ordm;&ucirc;&curren;&ordm;&acute;&iexcl;</FONT></H1>

<HR>
<BR>
<BR>&curren;G&ordm;&ucirc;&curren;&ordm;&acute;&iexcl;&raquo;P&curren;@&ordm;&ucirc;&curren;&ordm;&acute;&iexcl;&ordf;&ordm;&reg;t&sect;O&not;O&shy;n&curren;&ordm;&acute;&iexcl;&ordf;&ordm;&frac14;&AElig;&frac34;&Uacute;&not;O&curren;G&ordm;&ucirc;&iexcl;A&sect;Y&not;O
<BR>
<BR><IMG SRC="img00007.gif" tppabs="http://166.111.167.223/computer/cai/matlabjc/img00007.gif" HEIGHT=22 WIDTH=300>&nbsp;
<BR>
<BR>MATLAB&ordf;&ordm;&curren;G&ordm;&ucirc;&curren;&ordm;&acute;&iexcl;&uml;&ccedil;&frac14;&AElig;&not;O<FONT COLOR="#FF0000">interp2</FONT>&iexcl;A&uml;&auml;&raquo;y&ordf;k&not;&deg;<FONT COLOR="#FF0000">interp2(X,Y,Z,XI,YI)</FONT>&iexcl;A&uml;&auml;&curren;&curren;&ordf;&ordm;<FONT COLOR="#FF0000">X,Y,Z</FONT>&not;O&shy;&igrave;&curren;w&ordf;&frac34;&ordf;&ordm;&frac14;&AElig;&frac34;&Uacute;&ordf;&ordm;<I>x,y,z</I>
&shy;&Egrave;&iexcl;A&sup3;o&sup2;&Otilde;&frac34;&Uacute;&frac34;&Uacute;&ordf;&ordm;&middot;N&cedil;q&not;O<FONT FACE="Times New Roman">
<I>Z=Z(X,Y)</I></FONT>&iexcl;C&yen;t&yen;~<I>Z</I> &macr;x&deg;}&curren;j&curren;p&yen;&sup2;&para;&middot;&not;O<IMG SRC="img00008.gif" tppabs="http://166.111.167.223/computer/cai/matlabjc/img00008.gif" HEIGHT=17 WIDTH=52>&iexcl;A&brvbar;&Oacute;<FONT COLOR="#FF0000">XI,YI</FONT>&laquo;h&not;O&shy;n&curren;&ordm;&acute;&iexcl;&ordf;&ordm;&frac14;&AElig;&frac34;&Uacute;&Acirc;I&iexcl;C&brvbar;p&ordf;G
&raquo;y&ordf;k&not;O<FONT COLOR="#FF0000">interp2(X,Y,Z,XI,YI,'method')</FONT>&iexcl;A<FONT COLOR="#FF0000">method</FONT>&yen;i&yen;H&sup3;]&copy;w&curren;&ordm;&acute;&iexcl;&curren;&egrave;&ordf;k&brvbar;&sup3;<FONT COLOR="#FF0000">linear</FONT>,<FONT COLOR="#FF0000">cubic</FONT>&iexcl;A&curren;&Agrave;&sect;O&not;O&curren;@&brvbar;&cedil;&copy;M&curren;T&brvbar;&cedil;&curren;&egrave;&micro;{&brvbar;&iexcl;&iexcl;A
&uml;&auml;&curren;&curren;&sup1;w&sup3;]&curren;&egrave;&ordf;k&not;O<FONT COLOR="#FF0000">linear</FONT>&iexcl;C&sect;&Uacute;&shy;&Igrave;&yen;H&curren;U&shy;&plusmn;&ordf;&ordm;&uml;&Ograve;&curren;l&raquo;&iexcl;&copy;&uacute;&iexcl;C&deg;&sup2;&sup3;]&brvbar;&sup3;&curren;@&shy;&Oacute;&uml;T&uml;&reg;&curren;&THORN;&Agrave;&ordm;&ordf;&ordm;&Acirc;&agrave;&sup3;t&iexcl;]&sup3;&aelig;&brvbar;&igrave;&not;&deg;rpm&iexcl;^&iexcl;B&middot;&Aring;&laquo;&times;&raquo;P&reg;&Eacute;
&para;&iexcl;&iexcl;]&sup3;&aelig;&brvbar;&igrave;&not;&deg;sec&iexcl;^&ordf;&ordm;&para;q&acute;&uacute;&shy;&Egrave;&brvbar;p&curren;U

<TABLE BORDER >
<TR>
<TD WIDTH="66">time&nbsp;
</TD>

<TD COLSPAN="3" WIDTH="224">speed&nbsp;
</TD>
</TR>

<TR>
<TD WIDTH="66">0&nbsp;
</TD>

<TD WIDTH="72">2000 rpm&nbsp;
</TD>

<TD WIDTH="76">3000 rpm&nbsp;
</TD>

<TD WIDTH="76">4000 rpm&nbsp;
</TD>
</TR>

<TR>
<TD WIDTH="66">1&nbsp;
</TD>

<TD WIDTH="72">20&nbsp;
</TD>

<TD WIDTH="76">110&nbsp;
</TD>

<TD WIDTH="76">176&nbsp;
</TD>
</TR>

<TR>
<TD WIDTH="66">2&nbsp;
</TD>

<TD WIDTH="72">60&nbsp;
</TD>

<TD WIDTH="76">180&nbsp;
</TD>

<TD WIDTH="76">220&nbsp;
</TD>
</TR>

<TR>
<TD WIDTH="66">3&nbsp;
</TD>

<TD WIDTH="72">68&nbsp;
</TD>

<TD WIDTH="76">240&nbsp;
</TD>

<TD WIDTH="76">349&nbsp;
</TD>
</TR>

<TR>
<TD WIDTH="66">4&nbsp;
</TD>

<TD WIDTH="72">77&nbsp;
</TD>

<TD WIDTH="76">310&nbsp;
</TD>

<TD WIDTH="76">450&nbsp;
</TD>
</TR>

<TR>
<TD WIDTH="66">5&nbsp;
</TD>

<TD WIDTH="72">110&nbsp;
</TD>

<TD WIDTH="76">405&nbsp;
</TD>

<TD WIDTH="76">503&nbsp;
</TD>
</TR>
</TABLE>
&uml;&auml;&curren;&curren;&middot;&Aring;&laquo;&times;&ordf;&ordm;&frac14;&AElig;&frac34;&Uacute;&plusmn;q<FONT FACE="Times New Roman">
20<SUP>o</SUP>C</FONT>&Aring;&Uuml;&curren;&AElig;&uml;&igrave;<FONT FACE="Times New Roman">
503<SUP>o</SUP>C</FONT>&iexcl;A&brvbar;p&ordf;G&shy;n&brvbar;&ocirc;&shy;p&brvbar;b<FONT FACE="Times New Roman">t=2.6,
sec, rpm=2500 </FONT>&ordf;&ordm;&middot;&Aring;&laquo;&times;&iexcl;A&yen;i&yen;H&curren;U&brvbar;C&laquo;&uuml;&yen;O&shy;p&ordm;&acirc;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> d2(:,1)=[0 1 2 3
4 5]'; % </FONT>&plusmn;N&reg;&Eacute;&para;&iexcl;&iquest;&eacute;&curren;J</FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> d2(:,2)=[2000 20
60 68 77 110]'; % </FONT>&plusmn;N<FONT FACE="Times New Roman"> rpm=2000
</FONT>&ordf;&ordm;&middot;&Aring;&laquo;&times;&iquest;&eacute;&curren;J</FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> d2(:,3)=[3000 110
180 240 310 405]'; % </FONT>&plusmn;N<FONT FACE="Times New Roman"> rpm=3000
</FONT>&ordf;&ordm;&middot;&Aring;&laquo;&times;&iquest;&eacute;&curren;J</FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> d2(:,4)=[4000 176
220 349 450 503]'; % </FONT>&plusmn;N<FONT FACE="Times New Roman"> rpm=4000
</FONT>&ordf;&ordm;&middot;&Aring;&laquo;&times;&iquest;&eacute;&curren;J</FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> t=d2(2:6,1); % </FONT>&iquest;&iuml;&frac34;&Uuml;&deg;&micro;&curren;&ordm;&acute;&iexcl;&ordf;&ordm;&reg;&Eacute;&para;&iexcl;</FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> rpm=d2(1,2:4); %
</FONT>&iquest;&iuml;&frac34;&Uuml;&deg;&micro;&curren;&ordm;&acute;&iexcl;&ordf;&ordm;<FONT FACE="Times New Roman">
rpm</FONT></FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> temp=d2(2:6,2:4);
% </FONT>&iquest;&iuml;&frac34;&Uuml;&deg;&micro;&curren;&ordm;&acute;&iexcl;&ordf;&ordm;&middot;&Aring;&laquo;&times;</FONT>&nbsp;
<BR>
<BR><FONT COLOR="#FF0000"><FONT FACE="Times New Roman">>> temp_i=interp2(rpm,t,temp,2500,2.6)
% </FONT>&yen;H&frac12;u&copy;&Ecirc;&curren;&ordm;&acute;&iexcl;&uml;M&copy;w<FONT FACE="Times New Roman">
rpm=2500,t=2.6 </FONT>&ordf;&ordm;&middot;&Aring;&laquo;&times;</FONT>&nbsp;
<BR>
<BR><FONT FACE="Times New Roman"><FONT COLOR="#FF0000">temp_i =</FONT></FONT>&nbsp;
<BR>
<BR><FONT FACE="Times New Roman"><FONT COLOR="#FF0000">140.4000</FONT></FONT>&nbsp;
<BR>
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