Question

我在matlab中编写了以下代码，它应该返回向量uexact：

function v=uexact(x,t)
  v=sin(2*pi*x)*exp(-4*pi^2*t);
end

function [ex]=test3

  h = 1/50; 
  T=1/2500; 

  x=0:h:1; 
  t=0:T:1; 



  ex=uexact(x,t);

end

我收到以下警告信息：

??? Error using ==> mtimes
Inner matrix dimensions must agree.

Error in ==> uexact at 3
  v=sin(2*pi*x)*exp(-4*pi^2*t);

Error in ==> test3 at 11
  ex=uexact(x,t);

你能说出我的错误吗？

Answer 1

问题是您的t和x大小不同。然后在您的函数中，您尝试将sin(2*pi*x) 1x51与exp(-4*pi^2*t) 1x2501相乘，即v=sin(2*pi*x)'*exp(-4*pi^2*t);。这是尺寸不匹配，如您收到的错误消息中所述。

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matlab出错

1 个答案: