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How to find a specific number in a specific column in an excel file and how many times it occurs

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Sergio
Sergio 2024-1-31
评论： Sergio 2024-1-31
Hi, I have been looking around for a solution to this problem, I have an excel file and it contains the number -1100 in the column with header "T". I want to find out how many times this number occurs in this given column. So I tried
[~, ~, data] = xlsread('test.xlsx');
data = string(data); % convert to string for easy comparision
rowsIndex = data(:, 1) == "T" && data(:, 2) == "-1100";
requiredRows = data(rowsIndex, :);
but this does not work. How can I find the number of times it occurs in the T column?
Thanks

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VBBV
VBBV 2024-1-31
Ran in:
D = readtable('test.xlsx');
rowsIndex = D.T == -1100;
requiredRows = D(rowsIndex, :)
requiredRows = 17×12 table
REGNR T T64 T65 T79 T80 T83 T84 T87 T88 T97 T98 _____ _____ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ 9 -1100 191.38 191.29 191.34 190.62 191.41 191.03 191.38 190.44 190.91 191.03 12 -1100 194.52 193.4 194.3 193.16 194.81 193.75 194.07 193.03 195.2 195.72 23 -1100 193.87 193.3 193.5 191.49 193.62 192.14 193.23 191.18 192.28 192.66 28 -1100 191.74 191.73 191.65 191.72 191.77 191.84 191.77 191.74 191.53 191.53 118 -1100 191.33 189.7 191.23 191.13 191.32 191.31 191.39 191.25 191.27 191.2 172 -1100 189.74 189.47 189.71 189.5 189.88 189.77 189.87 189.58 189.77 189.75 365 -1100 237.13 190.19 235.62 206.26 238.91 214.46 223.89 202.74 218.9 227.26 366 -1100 191.31 142.71 191.25 191.48 191.34 191.51 191.45 191.69 191.27 191.2 561 -1100 195.96 143.38 195.2 193.84 195.15 194.57 194.74 193.63 194.32 194.61 755 -1100 195.34 145.73 194.65 193.44 194.53 194.4 194.25 193.3 193.88 194.13 956 -1100 192.45 158.16 192.34 192.01 192.41 192.33 192.43 192.01 192.16 192.16 1052 -1100 191.47 139.29 191.45 191.22 191.55 191.49 191.65 191.26 191.42 191.4 1053 -1100 191.45 144.82 191.44 191.16 191.53 191.46 191.63 191.17 191.38 191.37 1111 -1100 191.76 149.01 191.74 191.54 -1100 191.83 191.84 191.59 191.77 191.72 1131 -1100 192.45 161.37 192.43 192.33 -1100 192.53 192.51 192.46 192.47 192.4 1133 -1100 192.1 144.37 192.01 191.93 -1100 192.11 192.13 192.07 192.03 191.97
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Sergio
Sergio 2024-1-31
I tried with
D = readtable('hakansexempeldata1.xlsx');
rowsIndex = D.T == -1100;
requiredRows = D(rowsIndex, :)
C = size(requiredRows,1)
got C =
17
so it would be 17 times

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