Symbols vs Floating points

2 次查看（过去 30 天）
Richard
Richard 2012-3-28
This question has to do with the question in this link which Jan has kindly shed some light on.
http://www.mathworks.co.uk/matlabcentral/answers/33744-error-using-odearguments
As mentioned in my comment, I am wondering why my x0 is of class 'sym'. I tried playing around with it and discovered that the problem lies with c0=f(a0,b0).
But I don't know what I can do with it to make it a 'double'. The thing is c0 is a number, no?
  5 个评论
显示 3更早的评论
Richard
Richard 2012-3-28
Thanks, Jan.
f = @(a,b) diff(100*a^5+b, sym('a'));
a0=10;
b0=10;
c0=f(a0,b0);
x0 = [a0,b0,c0];
The curly brackets aren't actually there (though the square ones are) -- I thought that using the curly ones in this forum gives the code font -- sorry it is really me being stupid!
Jan
Jan 2012-3-28
The formatting in this forum is not intuitive.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Jan
Jan 2012-3-28
Your f contains the term "sym('a')". Therefore the results get the type sym also. Perhaps you want to use the command double to make the symbolic expression numerically.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Operations on Strings 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by