📄 颜色控制.htm
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style="MARGIN-LEFT: 42.6pt; VERTICAL-ALIGN: bottom; TEXT-INDENT: -21.3pt"><SPAN
lang=EN-US><SPAN style="mso-tab-count: 1">
</SPAN>已引用的字符串内，要用双引号。如：</SPAN><SPAN style="FONT-FAMILY: 'Times New Roman'"> <B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US>'</SPAN></B><SPAN
lang=EN-US> <B style="mso-bidi-font-weight: normal">quoted '
</B></SPAN></SPAN><B style="mso-bidi-font-weight: normal">：</B><B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><SPAN style="mso-spacerun: yes">
</SPAN>' a<SPAN style="mso-spacerun: yes"> </SPAN>'<SPAN
style="mso-spacerun: yes"> </SPAN>' quoted '<SPAN
style="mso-spacerun: yes"> </SPAN>'<SPAN style="mso-spacerun: yes">
</SPAN>string ' </SPAN>；</B><B style="mso-bidi-font-weight: normal"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"> ' Quote<SPAN
style="mso-spacerun: yes"> </SPAN>'<SPAN style="mso-spacerun: yes">
</SPAN>' a<SPAN style="mso-spacerun: yes"> </SPAN>'<SPAN
style="mso-spacerun: yes"> </SPAN>'<SPAN style="mso-spacerun: yes">
</SPAN>' quoted '<SPAN style="mso-spacerun: yes"> </SPAN>'<SPAN
style="mso-spacerun: yes"> </SPAN>'<SPAN style="mso-spacerun: yes">
</SPAN>string '<SPAN style="mso-spacerun: yes"> </SPAN>' now
'</SPAN>。</B>在引号后要用逗号或空格结尾。</P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.6pt; VERTICAL-ALIGN: bottom; TEXT-INDENT: -21.3pt"><SPAN
lang=EN-US><SPAN style="mso-tab-count: 1">
</SPAN>除了最后一句，各语句在</SPAN><SPAN
style="FONT-FAMILY: 黑体">引号内</SPAN>要以逗号或分号结尾；在<SPAN
style="FONT-FAMILY: 黑体">引号后</SPAN>要用逗号或空格结尾。</P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.6pt; VERTICAL-ALIGN: bottom; TEXT-INDENT: -21.3pt"><SPAN
lang=EN-US><SPAN style="mso-tab-count: 1">
</SPAN>有后续行的各行要以三个句号</SPAN><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">(...)</SPAN>结尾。<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom">前面的例子之一<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">mmenu4.m</SPAN></B>是所涉及的回调字符串句法的很好说明。<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'">>><SPAN
style="mso-spacerun: yes"> </SPAN>Hm_top<SPAN
style="mso-spacerun: yes"> </SPAN>=<SPAN style="mso-spacerun: yes">
</SPAN><I style="mso-bidi-font-style: normal">unimenu</I>(Label ' </SPAN>，<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"> ' Example ' )</SPAN>；<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'">>><SPAN
style="mso-spacerun: yes"> </SPAN>HM_boxon<SPAN
style="mso-spacerun: yes"> </SPAN>=<SPAN style="mso-spacerun: yes">
</SPAN>uimenu(Hm_top</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' Label ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' Set '<SPAN
style="mso-spacerun: yes"> </SPAN>Box on ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' CallBack ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">[...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' set(gca</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''Box''</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''on'')</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>set(Hm_boxon</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''Enable''</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''off'')</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN><SPAN
style="mso-spacerun: yes"> </SPAN>set(Hm_boxoff</SPAN>，<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'">''Enable''</SPAN>，<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'">''on'') ' ]</SPAN>；<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'">>><SPAN
style="mso-spacerun: yes"> </SPAN>Hm_boxoff<SPAN
style="mso-spacerun: yes"> </SPAN>=<SPAN style="mso-spacerun: yes">
</SPAN>uimenu(Hm_top</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' Label ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' Set Box off ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' Enable ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' off '<SPAN
style="mso-spacerun: yes"> </SPAN>' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' CallBack ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">[...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' set(gca</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''Box''</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''off''</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' set(Hm_boxon</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''Enable''</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''on'')</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"> ' </SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">...<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 42.55pt; VERTICAL-ALIGN: bottom; tab-stops: 35.45pt"><SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>' set(Hm_boxoff''Enable''</SPAN>，<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">''off'') ' ]</SPAN>；<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom">上例中还引出了关于回调函数另一个重点，在变量<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">Hm_boxoff</SPAN></B>定义之前，在回调串中用<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">Hm_boxoff</SPAN></B>替代<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">Hm_boxon</SPAN></B>。因为回调串只是一个字符串，<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'">MATLAB </SPAN>不会给出警告，而且仅在<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">uimenu</SPAN></B>被激活并将字符串传给<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">eval</SPAN></B>时才由<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">MATLAB</SPAN>执行。它隐含有函数<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">M</SPAN>文件的设计和测试，这将在本章后面讨论。<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom"><SPAN lang=EN-US
style="FONT-FAMILY: 黑体">M文件的举例<o:p></o:p></SPAN></P>
<P class=MsoNormal style="VERTICAL-ALIGN: bottom"><B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></B></P>
<P class=MsoNormal
style="VERTICAL-ALIGN: bottom; TEXT-INDENT: 21.3pt">下例将演示一组简单菜单的生成。该例子包含在<SPAN
style="FONT-FAMILY: 楷体">精通</SPAN><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">MATLAB</SPAN><SPAN
style="FONT-FAMILY: 楷体">工具箱</SPAN>的函数<SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">M</SPAN>文件<B
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US
style="FONT-FAMILY: 'Times New Roman'">mmenus</SPAN></B>中。正如下面所示的那样，这个函数文件被分隔成了若干块，以便于讨论函数的各个方面。<SPAN
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="VERTICAL-ALIGN: bottom; TEXT-INDENT: 21.3pt">首先，定义一个函数并在当前的<SPAN
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