Assigning columns of matrix to strings.

Hello everyone

I have following matrix which have nums and I have stored strings in another.

Name={'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'i' 'j' 'k' };
Data=[ 1  2  3  4  5  6  7  8  9 10 11
      12 13 14 15 16 17 18 19 20 21 22
      23 24 25 26 27 28 29 30 31 32 33];

Number of rows and columns can vary but number of strings will remain same as thr number of columns in Data matrix

I want to assign column matrix to corresponding strings

like:

a = [1; 12; 23]
b = [2; 13; 24]
..... and so on

[DGM]

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

[Karanvir singh Sohal]

Thanks @DGM. Its always good to learn new things.

I'm going through your suggested link.

[Karanvir singh Sohal]

My variables doesn't named as 'a' 'b'.... in my orignal code.

This is just an example.

Answer 1

[Stephen23]

Naming variables dynamically is one way that beginners force themselves into writing slow, complex, buggy code:

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

Instead of doing that, you can write simple and efficient code by creating a structure:

Name={'a' 'b' 'c' 'd' 'e' 'f' 'g' 'h' 'i' 'j' 'k' };
Data=[ 1  2  3  4  5  6  7  8  9 10 11
      12 13 14 15 16 17 18 19 20 21 22
      23 24 25 26 27 28 29 30 31 32 33];
S = cell2struct(num2cell(Data,1),Name,2)

S = struct with fields:
    a: [3×1 double]
    b: [3×1 double]
    c: [3×1 double]
    d: [3×1 double]
    e: [3×1 double]
    f: [3×1 double]
    g: [3×1 double]
    h: [3×1 double]
    i: [3×1 double]
    j: [3×1 double]
    k: [3×1 double]

S.a

ans = 3×1

1 12 23

S.b

ans = 3×1

2 13 24

[Karanvir singh Sohal]

Hey @Stephen Cobeldick,

Thanks for your valuable help.

But due to some requirement of my code I cannot call 'S.a' etc.

Is it possible to assign values directly to strings? for loop can also work .

Rather than calling 'S.a', I'll get results by just calling 'a'.

Thanks in advance :)

[Stephen23]

"But due to some requirement of my code I cannot call 'S.a' etc."

Based on your description so far, it sounds like code refactoring is likely to be the best option (e.g. by converting scripts into much better functions, so this problem disappears).

"Is it possible to assign values directly to strings? for loop can also work ."

Of course, as many examples in that link clearly show (and as long as you want to force yourself into writing slow, complex, obfuscated, buggy code that is hard to debug).

[Karanvir singh Sohal]

Thanks @Stephen Cobeldick

I'll try to find possible solution to my problem and use "cell2struct".

[Karanvir singh Sohal]

@Stephen Cobeldick saved myself from code refactoring :)

figured out the error and possible solution for that.

Thanks once again.