How to navigate on indexed table with user input

Question

Usune Elizondo 2021-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/1459834-how-to-navigate-on-indexed-table-with-user-input

评论： Usune Elizondo 2021-9-27

Hello, I have an indexed object on the workspace.

I would like to ask the user for all of the inputs. Then it will create the path to the exact value located inside the tables I have indexed.

dat1.dat2.dat3.(var)

I want to ask the user tu input one by one all dat1 dat2 dat3 and var, and then show the value. Something like this, which is wrong:

dat1=input('dat1:','s');

dat2=input('dat2:','s');

dat3=input('dat3;','s');

var=input('var:','s);

solution=dat1.dat2.dat3('var')

Any ideas?

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Usune Elizondo 2021-9-24

I think I have not explained myself properly.

I have some tables which are organized by indexing. So you can access with dot indexing to the different levels.

I would like to ask the user to give me the values of those levels until the variable they want to get the value of.

dat1.dat2.dat3(var)

so the user has to probide which dat1, which dat2, which dat3 and finally which var they want to visualize.

Thank you again

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Answer 1

Siddharth Bhutiya 2021-9-24

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https://ww2.mathworks.cn/matlabcentral/answers/1459834-how-to-navigate-on-indexed-table-with-user-input#answer_794479

在 MATLAB Online 中打开

You could use the t.(varName) syntax to do this. Here's a simple example

>> t = table(table(table([1;2;3],[4;5;6],'VariableNames',["V1","V2"]),'VariableNames',["TableVar"]))
t =
  3×1 table
      Var1   
    TableVar 
    _________
    1×2 table
    1×2 table
    1×2 table
>> dat1 = "Var1";
>> dat2 = "TableVar";
>> dat3 = "V2";
>> t.(dat1).(dat2).(dat3)
ans =
     4
     5
     6
     
% Which should be equivalent to doing the following
>> t.Var1.TableVar.V2
ans =
     4
     5
     6