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<TITLE> 图形放大及缩小 </TITLE>
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<H1>3.1.3 图形放大及缩小</H1>
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<FONT COLOR=#FF0000 FACE="Times New Roman">zoom</FONT><FONT FACE="Times New Roman">
</FONT>指令可以将图形放大或缩小，若要将图形放大时用<FONT FACE="Times New Roman">
</FONT><FONT COLOR=#FF0000 FACE="Times New Roman">zoom on</FONT>，<FONT COLOR=#FF0000 FACE="Times New Roman">zoom
out</FONT>，当不再须要放大或缩小图形时用<FONT FACE="Times New Roman">
</FONT><FONT COLOR=#FF0000 FACE="Times New Roman">zoom off</FONT>。<TT><FONT FACE="Courier New">
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<FONT COLOR=#FF0000 FACE="Times New Roman">>> M=peaks(25);
% peaks </FONT><FONT COLOR=#FF0000>是</FONT><FONT COLOR=#FF0000 FACE="Times New Roman">MATLAB</FONT><FONT COLOR=#FF0000>内建的一个像山峰的特别函数，</FONT><FONT COLOR=#FF0000 FACE="Times New Roman">25</FONT><FONT COLOR=#FF0000>是这个</FONT>
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<FONT COLOR=#FF0000 FACE="Times New Roman">>> plot(M) %
</FONT><FONT COLOR=#FF0000>函数矩阵的大小，如果数值愈大则画出的山峰图愈平滑</FONT>
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<FONT COLOR=#FF0000 FACE="Times New Roman">>> zoom on %
</FONT><FONT COLOR=#FF0000>开始放大图形，每按一次</FONT><FONT COLOR=#FF0000 FACE="Times New Roman">Enter</FONT><FONT COLOR=#FF0000>键图形就放大一次</FONT>
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<FONT COLOR=#FF0000 FACE="Times New Roman">>> zoom out
% </FONT><FONT COLOR=#FF0000>开始缩小图形，每按一次</FONT><FONT COLOR=#FF0000 FACE="Times New Roman">Enter</FONT><FONT COLOR=#FF0000>键图形就缩小一次</FONT>
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<FONT COLOR=#FF0000 FACE="Times New Roman">>> zoom off
% </FONT><FONT COLOR=#FF0000>停止图形放大或缩小功能<BR>
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