How to find selection frequency in a txt file?
2 views (last 30 days)
Show older comments
Hello all, I have 10 txt files (I share an example) and each file has a list of selected items. I have 13 items in total. What I want to know is how many times each item was selected but I am getting an error (Input must be a MAT-file or an ASCII file containing numeric data with same number of columns in each row) message. I think the problem is the varying length of each line. How can I fix it? Thanks for the help.
txtFiles = dir('*.txt');
nFiles = length(txtFiles);
for i = 1:nFiles
txtCnt = load(txtFiles(i).name);
fprintf('-----%s-----\n',txtFiles(i).name);
Frq = zeros(1,13);
for Indx = 1:13
Frq(Indx) = sum(txtCnt == Indx);
end
Results = [1:13; Frq]
idx = find(Frq > mean(Frq))
end
0 Comments
Accepted Answer
Cris LaPierre
on 1 May 2023
Do not use load. I would probably use readmatrix. Note that your rows do not all have the same number of elements. These rows are padded with NaN.
data = readmatrix("Testing.txt")
7 Comments
Cris LaPierre
on 2 May 2023
Looks like MATLAB is trying to guess where the data starts. This is a result of having a different number of values in each row. Use the 'NumHeaderLines' name value pair to indicate that the data starts on the first line.
txtFiles = dir('*.txt');
nFiles = length(txtFiles);
for i = 1:nFiles
txtCnt = readmatrix(txtFiles(i).name,'NumHeaderLines',0)
fprintf('-----%s-----\n',txtFiles(i).name);
Frq = zeros(1,13);
for Indx = 1:13
Frq(Indx) = sum(txtCnt == Indx,'all');
end
Results = [1:13; Frq]
idx = find(Frq > mean(Frq))
end
More Answers (0)
See Also
Categories
Find more on Text Data Preparation in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!