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

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rogox on 28 Jul 2021
Commented: Star Strider on 29 Jul 2021
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.

Answers (1)

Star Strider
Star Strider on 28 Jul 2021
Perhaps —
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

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