Leave out dot notation in table variables

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Dario Walter
Dario Walter 2019-6-19
评论： Walter Roberson 2021-2-14
Hey guys,
I am using quite a lot of functions that require the variables from a table "D". Because of that, every function has the input parameter "D". Since I do not want to redefine the variables at the beginning of each function, my question is as follows:
When it comes to calculation, it currently requires me to write "D.Speed", "D.Time" etc. instead of "Speed", "Time". Is there a way to avoid the "D." notation. In VBA, for example, you can code
% With D
% Speed....
% Time...
% end
I could not find an equivalent method in Matlab.
Your help is highly appreciated!
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Evan Droz
Evan Droz 2021-2-14
Why are you trying to correct someone's use of code and wasting their time instead of answering their question, or better yet, not saying anything at all?
Walter Roberson
Walter Roberson 2021-2-14
We have enough experience to know that the available methods to do what was asked, end up taking more time; and thus, the suggestions made to not do what was asked are suggestions aimed at having the poster not waste time.

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回答（2 个）

madhan ravi
madhan ravi 2019-6-19
编辑：madhan ravi 2019-6-19
I don’t know why it’s hard for you to use "D." , see https://in.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html to access table datas in different ways.
Walter Roberson
Walter Roberson 2019-6-19
The closest MATLAB equivalent is import but it only applies for packages https://www.mathworks.com/help/matlab/matlab_oop/scoping-classes-with-packages.html not for tables .
There are ways to do it dynamically, but those ways are error prone .
You should probably just do a bunch of search-and-replace to add in the table name.
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Stephen23
Stephen23 2019-6-19
"It simply makes the code hard do read beacause you always have to include the "D." notation."
To me that notation makes it clearer to read, because then I can tell immediately where each variable is defined (which in turn this makes code easier to write, debug, and maintain). And this advantage applies to the MATLAB JIT compiler just as much as it does to me!
What you are trying to do is certainly possible, but it would be complex, liable to bugs, and inefficient. Read this to know why:
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
"So you would leave it as it is?"
Yes, your code is fine just as it is.

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