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MATLAB 多项式变量代值求解

2011-03-29 14:28:55| 分类： predocIT | 标签： |举报 |字号大中小订阅

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假设对于一个多项式：g='x+y+1';要代入x=1，y=1情况下g的结果，可以用subs函数如下：

g='x+y+1';

a=subs(g, {'x' 'y'}, {1 1});

disp(a);

结果是a显示为3，这是代入多个变量的情形。至于单个变量的情形，不要大括号，直接写变量及其值就好了。这个东西很简单，但是用的少，怕忘记了，保存在这。

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