Go through the table with a loop and change values
12 次查看(过去 30 天)
显示 更早的评论
回答(3 个)
Subhadeep Koley
2020-2-12
编辑:Subhadeep Koley
2020-2-12
ds = record ("xlsfile", "dataset.csv");
data = dataset2table(ds);
[rows, cols] = size(data);
newData = data;
for i = 1: rows
for j = 1: cols
if table2array(data(i, j)) == -9
newData(i, j) = array2table(NaN);
end
end
end
7 个评论
Subhadeep Koley
2020-2-12
Your "dataset.csv" is encoded with UTF-16-LE, which is not fully supported by the function readtable. Therefore, I copied and pasted all the data in a new .xlsx file (attached here).
The below code might be helpful now although it is not a very efficient solution.
clc;
data = readtable('Book1.xlsx');
[rows, cols] = size(data);
newData = data;
for i = 1: rows
for j = 1: cols
temp = table2array(data(i, j));
if iscell(temp)
temp = cell2mat(temp);
end
if temp == -9
newData(i, j) = array2table(NaN);
end
end
end
Steven Lord
2020-2-12
The standardizeMissing function can accept arrays of various types, including table arrays and timetable arrays. If you only want to standardize the form in which missing data is stored for certain variables in your table you can tell it to only operate on specific 'DataVariables' as well.
0 个评论
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!