Hi Kawsar,
I understand you want to edit your file such that 90% of rows with 0 irradiation are removed.
You can use logical indexing to select the rows which have 0 irradiation. After that, you can use the 'randsample' function to select 10% of such rows. Here is the code to do so:
% Find rows where both irradiation columns are zero
rowsWithZeroIrradiation = all(x(:, 2:3) == 0, 2);
numZeroRows = sum(rowsWithZeroIrradiation);
numRowsToKeep = round(0.1 * numZeroRows);
zeroIrradiationIndices = find(rowsWithZeroIrradiation);
% Randomly select 10% of these indices to keep
indicesToKeep = randsample(zeroIrradiationIndices, numRowsToKeep);
logicalIndexToKeep = false(size(x, 1), 1);
logicalIndexToKeep(indicesToKeep) = true;
finalRowsToKeep = logicalIndexToKeep | ~rowsWithZeroIrradiation;
x = x(finalRowsToKeep, :);
You can learn more about logical indexing from the below documentation:
Hope this helps!
