Help me please,please

I'm having some difficulties in finding specific codes for something I want in MATLAB, I have to do a job and in that work I load the bible file in .txt in MATLAB with this open file I can do some things with it:

TL = textread ('bible.txt', '% c') ---- With this command I can count the number of letters.

PT = texread ('bible.txt', '% s') ---- With this I count the number of words.

but my difficulty is as follows:

I want a command to count only specific letters in this great text .txt, for example a code that allows to count only the A or only the B, give thanks already to who has read so far. (Forgive my English the same is not the best.)

[Walter Roberson]

See

https://www.mathworks.com/matlabcentral/answers/453328-assignment-text-files-write-a-function-called-char_counter-that-counts-the-number-of-a-certain-char

https://www.mathworks.com/matlabcentral/answers/451979-matlab-text-file-i-o

Answer 1

[Image Analyst]

Try this:

fileContents = fileread('bible.txt');
fileContents = fileContents - '!'; % Subtract ASCII ! to get numbers.
histogram(fileContents);
grid on;

[Gabriel Cunha]

the graph was generated, however I wanted to get more or less result like this: A = number of letters A B = number of letters B

[Walter Roberson]

Your original question asked to only count specific characters, not to produce a list of each unique contained character and a count of how many times it occurred.

[Gabriel Cunha]

Forgiveness for the difficulty of expressing yourself

[Image Analyst]

Try this:

% fileContents = fileread('bible.txt'); % Read in file from disk
% Make known, sample array.
fileContents = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz B ZZZ'
fileContents = upper(fileContents) - 'A' + 1; % Subtract ASCII ! to get numbers.
edges = 1 : 27;
% Show how many of all letters are there via a bar chart.
histObject = histogram(fileContents, edges);
grid on;
% Find out the number of "b" or "B" in the file
% Pass the number of the letter in the alphabet as an index of the Values array of the histogram object.
numberOfB = histObject.Values(2)
% Find out the number of "z" in the file
numberOfZ = histObject.Values(26)

Answer 2

[Walter Roberson]

[a, ~, aa] = find(accumarray(reshape(fileread('bible.txt'),[],1), 1));
fprintf('%c = %d\n', [a(:).'; aa(:).']);