matlab简介

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1.MATLAB 开发环境<br>1.1 MATLAB 的视窗环境<br>进入MATLAB之后,会看到一个视窗MATLAB Command Window称为指令视窗,它是你键入指令的地方同时 MATLAB也将计算结果显示在此。<br>1.2 简易计算<br>我们先从MATLAB的数学运算开始说明。就像计算器一样,数学式的计算是直接了当。如果我们要算 1+2+3及1×10+2×20+3×30这二个式子,它们就是接在提示符号>>之后要键入的算式,MATLAB将计算 的结果以ans显示。如果算式是x=1+2+3,MATLAB将计算的结果以x显示。 <br>
matlab简介
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<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/6277ebd1517cd20ea494fe05/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6277ebd1517cd20ea494fe05/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">1.MA<span class="_ _0"></span>TLAB <span class="ff2 sc1">&#24320;&#21457;&#29615;&#22659;</span></div><div class="t m0 x2 h3 y3 ff1 fs0 fc0 sc0 ls0 ws0">1.1 MA<span class="_ _0"></span>TLAB <span class="ff2 sc1">&#30340;&#35270;&#31383;&#29615;&#22659;</span></div><div class="t m0 x3 h3 y4 ff2 fs0 fc0 sc0 ls0 ws0">&#36827;&#20837;<span class="_ _1"> </span><span class="ff3">MA<span class="_ _2"></span>TLAB<span class="_ _1"> </span><span class="ff2">&#20043;&#21518;&#65292;&#20250;&#30475;&#21040;&#19968;&#20010;&#35270;&#31383;<span class="_ _1"> </span></span>MA<span class="_ _2"></span>TLAB Command W<span class="_ _3"></span>indow<span class="_ _1"> </span><span class="ff2">&#31216;&#20026;&#25351;&#20196;&#35270;&#31383;&#65292;&#23427;&#26159;&#20320;</span></span></div><div class="t m0 x2 h3 y5 ff2 fs0 fc0 sc0 ls0 ws0">&#38190;&#20837;&#25351;&#20196;&#30340;&#22320;&#26041;&#21516;&#26102;<span class="ff3"> MA<span class="_ _2"></span>TLAB<span class="_ _1"> </span><span class="ff2">&#20063;&#23558;&#35745;&#31639;&#32467;&#26524;&#26174;&#31034;&#22312;&#27492;&#12290;</span></span></div><div class="t m0 x2 h3 y6 ff1 fs0 fc0 sc0 ls0 ws0">1.2 <span class="ff2 sc1">&#31616;&#26131;&#35745;&#31639;</span></div><div class="t m0 x3 h3 y7 ff2 fs0 fc0 sc0 ls0 ws0">&#25105;&#20204;<span class="_ _4"></span>&#20808;&#20174;<span class="_ _5"> </span><span class="ff3">MA<span class="_ _2"></span>TLAB<span class="_ _1"> </span><span class="ff2">&#30340;&#25968;<span class="_ _4"></span>&#23398;&#36816;<span class="_ _4"></span>&#31639;&#24320;<span class="_ _4"></span>&#22987;&#35828;<span class="_ _4"></span>&#26126;&#12290;<span class="_ _4"></span>&#23601;&#20687;<span class="_ _4"></span>&#35745;&#31639;<span class="_ _4"></span>&#22120;&#19968;<span class="_ _4"></span>&#26679;&#65292;<span class="_ _4"></span>&#25968;&#23398;<span class="_ _4"></span>&#24335;&#30340;<span class="_ _4"></span>&#35745;&#31639;<span class="_ _4"></span>&#26159;&#30452;<span class="_ _4"></span>&#25509;&#20102;<span class="_ _4"></span>&#24403;&#12290;</span></span></div><div class="t m0 x2 h3 y8 ff2 fs0 fc0 sc0 ls0 ws0">&#22914;&#26524;&#25105;&#20204;&#35201;<span class="_ _4"></span>&#31639;<span class="ff3"> 1+2<span class="_ _4"></span>+3<span class="_ _1"> </span></span>&#21450;<span class="_ _1"> </span><span class="ff3">1&#215;10+2&#215;20+3&#215;30<span class="_ _1"> </span></span>&#36825;&#20108;&#20010;&#24335;&#23376;&#65292;<span class="_ _4"></span>&#23427;&#20204;&#23601;&#26159;&#25509;&#22312;<span class="_ _4"></span>&#25552;&#31034;&#31526;&#21495;<span class="_ _4"></span><span class="ff3">&gt;&gt;<span class="_ _4"></span></span>&#20043;&#21518;&#35201;&#38190;&#20837;<span class="_ _4"></span>&#30340;</div><div class="t m0 x2 h3 y9 ff2 fs0 fc0 sc0 ls0 ws0">&#31639;&#24335;<span class="_ _4"></span>&#65292;<span class="_ _4"></span><span class="ff3">MA<span class="_ _2"></span>TLAB<span class="_"> </span><span class="ff2">&#23558;&#35745;&#31639;<span class="_ _4"></span></span> <span class="_ _4"></span><span class="ff2">&#30340;<span class="_ _4"></span>&#32467;&#26524;<span class="_ _4"></span>&#20197;<span class="_ _5"> </span></span>ans<span class="_ _1"> </span><span class="ff2">&#26174;&#31034;<span class="_ _4"></span>&#12290;<span class="_ _4"></span>&#22914;&#26524;<span class="_ _4"></span>&#31639;<span class="_ _4"></span>&#24335;&#26159;<span class="_ _5"> </span></span>x=1<span class="_ _4"></span>+2+3<span class="ff2">&#65292;<span class="_ _4"></span></span>MA<span class="_ _2"></span>TLAB<span class="_"> </span><span class="ff2">&#23558;&#35745;<span class="_ _4"></span>&#31639;&#30340;<span class="_ _4"></span>&#32467;<span class="_ _4"></span>&#26524;&#20197;</span></span></div><div class="t m0 x2 h3 ya ff3 fs0 fc0 sc0 ls0 ws0">x<span class="_ _1"> </span><span class="ff2">&#26174;&#31034;&#12290;</span> </div><div class="t m0 x2 h4 yb ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; 1+2+3 </span></div><div class="t m0 x2 h4 yc ff3 fs0 fc0 sc0 ls0 ws0"> ans = </div><div class="t m0 x2 h4 yd ff3 fs0 fc0 sc0 ls0 ws0"> 6 </div><div class="t m0 x2 h4 ye ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; 1*10 + 2*20 + 3*30 </span></div><div class="t m0 x2 h4 yf ff3 fs0 fc0 sc0 ls0 ws0"> ans = </div><div class="t m0 x2 h4 y10 ff3 fs0 fc0 sc0 ls0 ws0"> 140 </div><div class="t m0 x2 h4 y11 ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; x=1+2+3 </span></div><div class="t m0 x2 h4 y12 ff3 fs0 fc0 sc0 ls0 ws0"> x = </div><div class="t m0 x3 h4 y13 ff3 fs0 fc0 sc0 ls0 ws0">6 </div><div class="t m0 x3 h3 y14 ff2 fs0 fc0 sc0 ls0 ws0">&#22914;&#26524;<span class="_ _4"></span>&#22312;<span class="_ _4"></span>&#19978;&#36848;<span class="_ _4"></span>&#30340;<span class="_ _4"></span>&#20363;&#23376;<span class="_ _4"></span>&#32467;<span class="_ _4"></span>&#23614;&#21152;<span class="_ _4"></span>&#19978;<span class="_ _7"></span> <span class="_ _8"> </span> <span class="_ _9"></span><span class="ff3">;<span class="_ _a"></span><span class="ff2"> <span class="_ _a"></span> &#65292;&#21017;<span class="_ _4"></span>&#35745;&#31639;<span class="_ _4"></span>&#32467;<span class="_ _4"></span>&#26524;&#19981;<span class="_ _4"></span>&#20250;<span class="_ _4"></span>&#26174;&#31034;<span class="_ _4"></span>&#22312;<span class="_ _4"></span>&#25351;&#20196;<span class="_ _4"></span>&#35270;<span class="_ _4"></span>&#31383;&#19978;<span class="_ _4"></span>&#65292;<span class="_ _4"></span>&#35201;&#24471;<span class="_ _4"></span>&#30693;<span class="_ _4"></span>&#35745;&#31639;<span class="_ _4"></span>&#20540;<span class="_ _4"></span>&#21482;&#39035;<span class="_ _4"></span>&#38190;<span class="_ _b"></span> <span class="_ _c"> </span> </span></span></div><div class="t m0 x2 h3 y15 ff2 fs0 fc0 sc0 ls0 ws0">&#20837;&#35813;&#21464;&#25968;&#20540;&#21363;&#21487;<span class="ff3"> </span></div><div class="t m0 x2 h4 y16 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; x=1+2+3; </span></div><div class="t m0 x2 h4 y17 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; x </span></div><div class="t m0 x3 h4 y18 ff3 fs0 fc0 sc0 ls0 ws0">x = </div><div class="t m0 x3 h4 y19 ff3 fs0 fc0 sc0 ls0 ws0">6</div><div class="t m0 x3 h3 y1a ff2 fs0 fc0 sc0 ls0 ws0">&#20197;&#19979;&#30340;&#20363;&#23376;&#26174;&#31034;<span class="_ _1"> </span><span class="ff3">MA<span class="_ _2"></span>TLAB<span class="_ _1"> </span><span class="ff2">&#23545;&#20351;&#29992;&#21464;&#37327;&#30340;&#24377;&#24615;</span> </span></div><div class="t m0 x2 h4 y1b ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; apple=5 </span></div><div class="t m0 x3 h4 y1c ff3 fs0 fc0 sc0 ls0 ws0">apples = </div><div class="t m0 x3 h4 y1d ff3 fs0 fc0 sc0 ls0 ws0">5 </div><div class="t m0 x2 h4 y1e ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; orange=10 </span></div><div class="t m0 x3 h4 y1f ff3 fs0 fc0 sc0 ls0 ws0">orange = </div><div class="t m0 x3 h4 y20 ff3 fs0 fc0 sc0 ls0 ws0">10 </div><div class="t m0 x2 h4 y21 ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; total_cost=apple*3+orange*3</span></div><div class="t m0 x3 h4 y22 ff3 fs0 fc0 sc0 ls0 ws0">total_cost = </div><div class="t m0 x3 h4 y23 ff3 fs0 fc0 sc0 ls0 ws0">45 </div><div class="t m0 x2 h4 y24 ff4 fs1 fc0 sc0 ls0 ws0">&#61550;<span class="_ _6"> </span><span class="ff3 fs0">&gt;&gt; average_cost=total_cost/(apple+orange) ??</span></div><div class="t m0 x3 h4 y25 ff3 fs0 fc0 sc0 ls0 ws0">average_cost = </div><div class="t m0 x3 h4 y26 ff3 fs0 fc0 sc0 ls0 ws0">7.6</div><div class="t m0 x2 h3 y27 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">MA<span class="_ _2"></span>TLAB<span class="_ _1"> </span><span class="ff2">&#25552;&#20379;&#22522;&#26412;&#30340;&#31639;&#26415;&#36816;&#31639;&#26377;&#65306;</span> </span></div><div class="t m0 x3 h3 y28 ff2 fs0 fc0 sc0 ls0 ws0">&#21152;<span class="ff3"> (+)</span>&#12289;&#20943;<span class="ff3"> (-)</span>&#12289;&#20056;<span class="ff3"> (*)</span>&#12289;&#38500;<span class="ff3"> (/)</span>&#12289;&#24130;&#27425;&#26041;<span class="ff3"> (^)</span>&#65292;&#33539;&#20363;&#20026;&#65306;<span class="ff3">5<span class="_ _4"></span>+3, 5-3, 5*3, 5/3, 5^3</span></div><div class="t m0 x2 h3 y29 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff2 fs0">&#20854;<span class="_ _4"></span>&#23427;&#20851;<span class="_ _4"></span>&#20110;<span class="_ _4"></span>&#35745;<span class="_ _4"></span>&#31639;<span class="_ _4"></span>&#24120;<span class="_ _4"></span>&#29992;&#30340;<span class="_ _4"></span>&#21151;<span class="_ _4"></span>&#33021;<span class="_ _4"></span>&#25105;<span class="_ _4"></span>&#20204;<span class="_ _4"></span>&#36890;<span class="_ _4"></span>&#36807;<span class="_ _4"></span>&#19968;&#20010;<span class="_ _4"></span>&#31639;<span class="_ _4"></span>&#24335;<span class="_ _4"></span>&#26469;<span class="_ _4"></span>&#35828;<span class="_ _4"></span>&#26126;&#12290;<span class="_ _4"></span>&#35201;<span class="_ _4"></span>&#35745;<span class="_ _4"></span>&#31639;<span class="_ _4"></span>&#38754;<span class="_ _4"></span>&#31215;<span class="_ _5"> </span><span class="ff3">Area =&#960;<span class="_ _4"></span> r</span></span></div><div class="t m0 x4 h5 y2a ff3 fs3 fc0 sc0 ls0 ws0">2</div><div class="t m0 x5 h3 y29 ff3 fs0 fc0 sc0 ls0 ws0"> <span class="_ _4"></span> ,<span class="_ _4"></span><span class="ff2">&#21322;<span class="_ _4"></span>&#24452;<span class="_ _5"> </span><span class="ff5">r </span></span>= <span class="_ _4"></span>2<span class="_ _4"></span><span class="ff2">&#65292;</span></div><div class="t m0 x2 h3 y2b ff2 fs0 fc0 sc0 ls0 ws0">&#21017;&#21487;&#38190;&#20837;<span class="ff3"> </span></div><div class="t m0 x2 h4 y2c ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; r=2; </span></div><div class="t m0 x2 h4 y2d ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; area=pi*r^2; </span></div><div class="t m0 x2 h4 y2e ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; area = </span></div><div class="t m0 x3 h4 y2f ff3 fs0 fc0 sc0 ls0 ws0">12.5664</div><div class="t m0 x2 h3 y30 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff2 fs0">&#25105;&#20204;&#20063;&#21487;&#20197;&#23558;&#19978;&#36848;&#25351;&#20196;&#25171;&#22312;&#21516;&#19968;&#34892;&#65292;&#20197;<span class="ff3">, </span>&#25110;&#26159;<span class="ff3">; </span>&#20998;&#24320;&#65292;&#20363;&#22914;<span class="ff3"> </span></span></div><div class="t m0 x2 h4 y31 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; r=2, area=pi*r^2 </span></div><div class="t m0 x2 h4 y32 ff4 fs2 fc0 sc0 ls0 ws0">&#61550;<span class="_ _d"> </span><span class="ff3 fs0">&gt;&gt; r=2; area=pi*r^2;</span></div></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div> </body> </html>
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