How to find and chart the frequency of a letter in column with histogram.

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N/A 2021-7-28

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https://ww2.mathworks.cn/matlabcentral/answers/888077-how-to-find-and-chart-the-frequency-of-a-letter-in-column-with-histogram

评论： Star Strider 2021-7-29

I am looking for a way to find the frequency of a letter appearing in each line of a column in an excel file. The only column I am looking at has data like this: HFHFHSHHAJHJA, HSAJHFGFSAGJ, HSGHSFFJHJ. All I have found online so far, specifically through the mathworks resources is

T = readtable('Data.xlsx');
Sets = T{:, 9};
histogram(Sets, 40, 'FaceAlpha',0.4);

Basically I am trying to find the frequency H appears in each line and then the total frequency of the column.

Thank you for your help.

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回答（1 个）

Star Strider 2021-7-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/888077-how-to-find-and-chart-the-frequency-of-a-letter-in-column-with-histogram#answer_756072

在 MATLAB Online 中打开

Perhaps —

Col = {'HFHFHSHHAJHJA'; 'HSAJHFGFSAGJ'; 'HSGHSFFJHJ'};
T = cell2table(Col)
T = 3×1 table
           Col       
    _________________

    {'HFHFHSHHAJHJA'}
    {'HSAJHFGFSAGJ' }
    {'HSGHSFFJHJ'   }
RowSum = cellfun(@(x)sum(x=='H',2),T{:,1})
RowSum = 3×1
     6
     2
     3
ColSum = sum(RowSum)
ColSum = 11