Convert an array of letters into numbers

I would like to convert an array of letters into numbers. Based on this code:

Alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

numbers = [3,6,12,1,1,3]
letters = Alphabet(numbers)

I would like to make the reverse of this. I mean I want to find eg 'HELLO' to which numbers correspont based on the above code.

[Stephen23]

http://web.archive.org/web/20210130113223/https://www.mathworks.com/matlabcentral/answers/731068-convert-an-array-of-letters-into-numbers

Answer 1

[Walter Roberson]

Alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

Alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

[~, HelloNumbers] = ismember('HELLO', Alphabet)

HelloNumbers = 1×5

8 5 12 12 15

Map(Alphabet) = 1:length(Alphabet);
Map('HELLO')

ans = 1×5

8 5 12 12 15

[Ivan Mich]

Thank you. One more question. Is there a way to "include" to Alphabet accents to letters (I mean à for example). I mean to regognize these accents and to give them one specific number?

[Walter Roberson]

Alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZÀÈÌÒÙÁÉÍÓÚÄËÏÖŸ';

Map(Alphabet) = 1:length(Alphabet);
Map('HÈLLÖ')

ans = 1×5

8 28 12 12 40

[Ivan Mich]

Is there a way to set A equal to Á and À? I mean in order to not take into account accents?

[Stephen23]

"Is there a way to set A equal to Á and À? I mean in order to not take into account accents?"

Yes, two approaches were given to you in answers to your earlier question (which you then deleted):

https://www.mathworks.com/matlabcentral/answers/721344-how-to-compare-letters-if-they-are-same

[Walter Roberson]

Alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZÀÈÌÒÙÁÉÍÓÚÄËÏÖŸ';

Map(Alphabet(1:26)) = 1:26;
Map(Alphabet(27:end)) = Map('AEIOUAEIOUAEIOY');
Map('HÈLLÖ')

ans = 1×5

8 5 12 12 15

Answer 2

[Ive J]

One way would be Map object:

alph = 'A':'Z';
num = 1:numel(alph); % or whatever
M = containers.Map(string(alph'), num);
term = 'HELLO';
arrayfun(@(x) M(x), string(term')).'
ans =
     8     5    12    12    15