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<h1>3.1 数组、结构和创建</h1>
<div id="github-icons"></div>
<h2>3.1.1 数组及其结构</h2>
<p>1 数组的维度</p>
<p>2 数组的规模及相关术语</p>
<p>3 获取数组结构参数的M指令</p>
<h2>3.1.2 行(列)数组的创建</h2>
<p>1 递增/减型行(列)数组的创建</p>
<p>2 其他类型行(列)数组的创建</p>
<h2>3.1.3 二维通用数组的创建</h2>
<p>1 小规模数组的直接输入法</p>
<p>2 中规模数组的数组编辑器创建法</p>
<p>3 中规模的M文件创建法</p>
<p>4 利用MATLAB函数创建数组<br>
<table class="tableizer-table">
<thead><tr class="tableizer-firstrow"><th>指 令</th><th>含 义</th><th>指 令</th><th>含 义</th></tr></thead><tbody>
<tr><td>diag</td><td>产生对角数组(2)</td><td>ones</td><td>产生全1数组</td></tr>
<tr><td>eye</td><td>产生单位数组(2)</td><td>zeros</td><td>产生全0数组</td></tr>
<tr><td>magic</td><td>产生魔方数组(2)</td><td> </td><td> </td></tr>
<tr><td>rand</td><td>产生均匀分布随机数组</td><td>random</td><td>生成各种分布随机数组</td></tr>
<tr><td>randn</td><td>产生正态分布随机数组</td><td>randsrc</td><td>在指定字符集上生成均匀分布随机数组</td></tr>
<tr><td>gallery</td><td>产生各种用途的测试数组/矩阵(ch4)</td></tr>
</tbody></table><br>
<B>例子</B><br>
<font color="#00A600">ones(2,4)</font><br>
<font color="#0000E3">ans =</font><br>
<font color="#0000E3"> 1 1 1 1</font><br>
<font color="#0000E3"> 1 1 1 1</font><br>
<br>
<font color="#00A600">rng(0)</font><br>
<font color="#00A600">randn(2,3)</font><br>
<font color="#0000E3">ans =</font><br>
<font color="#0000E3"> 0.5377 -2.2588 0.3188</font><br>
<font color="#0000E3"> 1.8339 0.8622 -1.3077</font><br>
<br>
</p>
<h2>3.1.4 数组构作技法综合</h2>
<p>数组操作函数
<table class="tableizer-table">
<thead><tr class="tableizer-firstrow"><th>指 令</th><th>含 义</th></tr></thead><tbody>
<tr><td>diag</td><td>提取对角元素,或生成对角阵</td></tr>
<tr><td>repmat</td><td>按指定的"行数、列数"铺放模块数组,以形成更大的数组</td></tr>
<tr><td>reshape</td><td>在总元素数不变的前提下,改变数组的"行数、列数"</td></tr>
<tr><td>flipud</td><td>以数组"水平中线"为对称轴,交换上下对称位置上的数组</td></tr>
<tr><td>fliplr</td><td>以数组"垂直中线"为对称轴,交换左右对称位置上的数组</td></tr>
<tr><td>rot90</td><td>把数组逆时针旋转90°</td></tr>
</tbody></table><br>
<B>例子</B><br>
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