counting How many times a letter apear in a notepad text?

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Armina Petrean 2023-4-5

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回答： Rik 2023-4-5

I have a rather large text in a notepad and I want to find out how many times a certain letter is repeated in it.For example, I want to know how many times all the letters of the alphabet appears in that text and then I want to plot it, to show me something like that .

but the text is pretty big. it is a reference corpus.

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Dyuman Joshi 2023-4-5

To clarify, you want to plot the frequency graph for Upper case letters, lower case letters and digits individually from a given text?

Armina Petrean 2023-4-5

yes

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采纳的回答

Rik 2023-4-5

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1941639-counting-how-many-times-a-letter-apear-in-a-notepad-text#answer_1209664

在 MATLAB Online 中打开

txt = 'The quick broWn fox jUmps oVer the lazy dog 1 2 3 4 5 6 7 8 9 0';

Edges = double(['a':'z' 'A':'Z' '0123456789']) + [-0.5;0.5];

Edges = unique(Edges(:));

histogram(double(txt),Edges)

I will leave setting the XTickLabels for you. You can also use histcounts instead and create a bar graph with its output (so you can skip the values between 'Z' and 'a').