finding most common letter in a bunch of words

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Max
Max 2015-11-10
评论： Guillaume 2015-11-10
say I have a bunch of words
x={'abac';'abaca';'abacate';'abacay';'abacinate';'abacination';'abaciscus'}
What would I write to find the most common letter in x so for example Most_common_letter=%most common letter that appears in x

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采纳的回答

Stephen23
Stephen23 2015-11-10
编辑：Stephen23 2015-11-10
It is easy using mode:
>> x={'abac';'abaca';'abacate';'abacay';'abacinate';'abacination';'abaciscus'};
>> char(mode(+[x{:}]))
ans = a

更多回答（2 个）

Guillaume
Guillaume 2015-11-10
Two steps are required:
  1. build the histogram of the letters, however you want (using accumarray, histc or histcounts)
  2. find the max of the histogram
x = {'abac';'abaca';'abacate';'abacay';'abacinate';'abacination';'abaciscus'};
[letter, ~, pos] = unique([x{:}]);
letterhist = accumarray(pos, 1); %letter histogram
[~, maxidx] = max(letterhist);
fprintf('the most frequent letter is: %c\n', letter(maxidx));
  2 个评论
Max
Max 2015-11-10
I dont want to print the value, is it possible to just have most_common_letter='a' as an answer?
Guillaume
Guillaume 2015-11-10
The printing was just for demo. Getting the letter is there right in the code:
letter(maxidx)

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Thorsten
Thorsten 2015-11-10
编辑：Thorsten 2015-11-10
x={'abac';'abaca';'abacate';'abacay';'abacinate';'abacination';'abaciscus'};
[h c] = hist(double([x{:}]), double('a':'z'))
[~, idx] = max(h);
char(c(idx))

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