How to access table with eval?

Hey guys,

i am creating a table with

 eval([N '= table']);

Now i want to write data in that table with smth. like:

 eval([N'.Torque1cNm = cell2mat(raw(:,1)']);

But i get the error massage

 Error: This statement is incomplete.

I don´t know where my mistake is.

I hope u can help me.

Thanks in advance

[Adam]

Why don't you just use normal assignment and creation functions? 'eval' is not a good function to use in any circumstance.

N = table
N.Torque1cNm = cell2mat(raw(:,1) );

etc.

You are missing a parentheses off your statement too, which would be a lot more obvious if it wasn't wrapped in an eval.

[Guillaume]

Why on earth do you want to name your table dynamically? Every single line of code will just end up being an eval which comes with no syntax highlighting, cannot be check by matlab for error before executing the line and run slows since it disable all the JIT optimisations

If you need to create several tables just store them in a cell array, which has none of the downside above.

[Stephen23]

"I don´t know where my mistake is."

Your code is missing one closing parenthesis. Of course if you had not used awful eval then MATLAB's inbuilt code checking would have highlighted this error and made it easy to fix, but because you decided to use eval you have forced yourself into writing buggy code that is harder to debug (because none of the static code checking tools work). This is one of the reasons why the MATLAB documentation and all MATLAB experts advise against doing what you are doing:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Jan]

@Y.J.: Please do not cross-post a question in multiple forums, because this wastes the time of the ones who post answers, when they write something, which has been posted already elsewhere. If you have a really good reason for cross-posting, please add links to the other threads in each forum. Thanks.

Answer 1

[Jan]

While the suggestions to avoid eval are the way to go, the actual problems are:

eval([N'.Torque1cNm = cell2mat(raw(:,1)']);
       ^                               ^

The first is interpreted as transposition, and at the second mark a closing parenthesis is missing.

eval([N, '.Torque1cNm = cell2mat(raw(:,1))']);

But again: Don't do this. It is drilling a hole in your knee.