How to 'extract" a matrix named the same way as a string in a matrix?

I am not sure even if what I asked is correct (new user), but, I have a matrix E0=[1 2] and L=['R1' 'E0']. I'd like to extract the string 'E0' from L and magicly E0 =[1 2] appears on the command window. May you help me, please?

[Azzi Abdelmalek]

This is not clear

Answer 1

[Mischa Kim]

Aroldo, is this what you are looking for?

 E0 = [1 2];
 L  = {'R1' 'E0'};

 v  = genvarname(L{2});  % change from L{2} to L{1} to see what happens
 if exist(L{2},'var')    % change from L{2} to L{1} to see what happens
    eval([v '= E0'])
 end
 clear all

[Aroldo]

Exactly it! Thank you, and sorry about not properly write my question.

Answer 2

[Azzi Abdelmalek]

You want to extract 'E0' from L={'R1' 'E0'}, how? why do you wan to extract it when you already have it?

From your question you have

E0=[1 2]
L={'R1' 'E0'}

Now what do you want to do?

Extracting 'E0' from L doesn't make sens.

If you want to display E0=[1 2], just write

disp([L{2} '=[' num2str(E0) ']'])

or

disp(['E0=[' num2str(E0) ']'])