String elements of a cell as a name to the array elements of another cell

Question

Debjyoti Basu 2016-8-16

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编辑： Stephen23 2019-6-25

Dear friends, can you plz. give me the solution of the problem which I stated below. I have two cell q{22,1) and each element of this cell is a string array. I have another cell r{22,1} and each element of this cell is an array. Now I want to use the element of 'q' as a name to the corresponding element of 'r' and it will be appear in matlab workspace separately. For an example, q{1,1} element will be the name of the array r{1,1} and appear in matlab workspace. Sincerely, Debjyoti

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Stephen23 2016-9-14

编辑：Stephen23 2019-6-25

https://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

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

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Answer 1

Azzi Abdelmalek 2016-8-16

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What is the aim of doing this? this is not recommended, read this http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

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Azzi Abdelmalek 2016-8-17

在 MATLAB Online 中打开

Now, if you want to know how to do it:

q={1:2 3:4}
r={'a' 'b'}
for k=1:numel(q)
  assignin('base',r{k},q{k})
end

But you have to know it's a very bad idea!

Debjyoti Basu 2016-8-17

Azzi, thnx for giving me the answer. It is useful. great, Deb

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Answer 2

John BG 2016-8-17

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https://ww2.mathworks.cn/matlabcentral/answers/299822-string-elements-of-a-cell-as-a-name-to-the-array-elements-of-another-cell#answer_231982

在 MATLAB Online 中打开

Debjyoti

Use the command evalin.

evalin executes whatever you input, as long it's valid syntax.

For instance, let's say you have the following stored

q{1,1}='var1';

do the following

1.

read the contents of the cell that has the names you want to use as names of variables, for instance:

var_name=q{1,1}

2.

let's say that you want to create a variable with name in q{1,1} and the following value:

value=35.6

3.

Now build the string to input evalin

string1=num2str(value);string1=[var_name '=' num2str(value)]

4.

execute evalin

evalin('base',string1)

Now in the workspace you have a new variable, named as the contents of q{1,1} with the chosen value.

Debjyoti

If you find this answer useful would you please be so kind to mark my answer as Accepted Answer?

To any other reader, please if you find this answer of any help solving your question,

please click on the thumbs-up vote link,

thanks in advance

John BG

<mailto:jgb2012@sky.com jgb2012@sky.com>

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Debjyoti Basu 2016-8-17

John, thnx for giving me the reply. It is useful as well. Deb

John BG 2016-8-17

在 MATLAB Online 中打开

Debjyoti

Thanks for the accepted answer.

Look for correct answers, some people in this forum try to hit many answers, attempting to maximise the chances of scoring credit, and then we come across telegraphic answers, which are essentially like if

when asking for Uranium atomic number,

the reader gets

Check in the periodic table

and sometimes they even moan and try to get the credit away from the one who took the time and effort to supply a useful answer.

Do not hesitate asking anything MATLAB SIMULINK related you consider worth asking, moreover if it's homework.

This forum is to learn MATLAB, regardless of it's homework or not.

Regards

John BG

<mailto:jgb2012@sky.com jgb2012@sky.com>

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