Replacing numbers with letters in a matrix

I have a matrix like Matr=[2 1 2 1 4 1 3;3 4 3 4 3 4 4;1 3 1 3 2 3 2;4 2 4 2 1 2 1]; and i want to change 1 to a, 2 to b,3 to c and 4 to d. Finally i want to get a matrix like b a b a d a c; c d c d c d d; a c a c b c b; d b d b a b a;

 but i had issues with matrix type. What is the ideal way to do.
Thank you very much

Answer 1

[Friedrich]

Hi,

I would do it this way:

 char(Matr+96)

[Al]

thank you it works. but what if if i want to change them to arbitrary letters. 1 to z, 2 to g etc.

[Friedrich]

Matr=[2 1 2 1 4 1 3;3 4 3 4 3 4 4;1 3 1 3 2 3 2;4 2 4 2 1 2 1];

res = char(zeros(size(Matr)));

res(Matr==1) = 'z';

res(Matr==2) = 'g';

res(Matr==3) = 'l';

res(Matr==4) = 'a';

[Al]

thank you very much. You've just saved my day!

[summyia qamar]

 i'm doing this

m=[2 2.8 2.5 2 2.5 2.8 2.5 37243]; res=char(zeros(size(m))) res(m==2)='worker1' res(m==2.5)='worker2' res(m==2.8)='worker3' res(m==3)='worker4'

but the output message shows In an assignment A(:) = B, the number of elements in A and B must be the same.

Answer 2

[Steven Lord]

If all the elements of your matrix are positive integer values, you can use indexing.

Matr=[2 1 2 1 4 1 3;3 4 3 4 3 4 4;1 3 1 3 2 3 2;4 2 4 2 1 2 1]; 
letters = 'abcd';
Y = letters(Matr)

If you want to create a cell array of words or a string array you can do that too.

C = {'alfa', 'bravo', 'charlie', 'delta'};
S = string(C);
Y2 = C(Matr)
Y3 = S(Matr)