Info

此问题已关闭。 请重新打开它进行编辑或回答。

cannot figure out the reason for a warning message

1 次查看（过去 30 天）
Carlos
Carlos 2013-2-14
关闭： MATLAB Answer Bot 2021-8-20
Hi, I am working with a piece of code, and though the code seems to work well(as the results yielded seem to be correct)Matlab shows the following warning:
Warning: new entry not compatible with coefficient domain
[(Dom::Matrix(Dom::ExpressionField()))::set_index]
When executing the following code (Jcpg is a symbolic matrix):
Jcpg=zeros(length(candelabroc),length(vectpg));
Jcpg(1:length(candelabroc),1:length(vectpg))=
(1/h)*subs(candelabroc(1:length(candelabroc)),{vectpg(1:length(vectpg))},
{X(1:length(vectpg))+h1},0);
I cannot figure out the reason for this warning. Any ideas?
  2 个评论
Walter Roberson
Walter Roberson 2013-2-14
Question: after you do the subs() are there any remaining free variables in the formula? If there are, then it would not be possible to automatically convert the result to double precision as would be required to store the result into a numeric matrix, as Jcpp is initialized as numeric and not symbolic.
Question: why are you indexing candelabroc(1:length(candelabroc)) instead of just passing candelabroc ? Likewise for vectpg ?
Carlos
Carlos 2013-2-15
I did not include a part of the code that converted Jcpg to a symbolic matrix.Jcpg=sym(Jcpg); There are free variables after doing the subs. In the end I found out what the problem was. The problem comes with the indexing of (1:length(candelabroc),1:length(vectpg))
Thank you for being so helpful Walter.

此问题已关闭。

回答（0 个）

此问题已关闭。

标签

Community Treasure Hunt

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

Start Hunting!

Translated by