Deleting specific values from multidimensional matrix

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okoth ochola
okoth ochola el 12 de Jun. de 2022
Respondida: Image Analyst el 12 de Jun. de 2022
I have a huge data which can be repersented as matrix of dimenson 34000 by 2. I would like to delete some rows that contains undesirable value(outliers). How can I go about this? Kindly assist, thank you

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Image Analyst
Image Analyst el 12 de Jun. de 2022
That's far from huge. Anyway, determine which rows need to be deleted and then set those rows to null. For example if the undesireable rows are where the first column has negative numbers then do this
rowsToBeDeleted = data(:, 1) < 0;
data(rowsToBeDeleted, :) = []; % Set to null to remove the entire row.
Or, equivalently you could do
goodRows = data(:, 1) > 0;
data = data(goodRows, :); % Extract only the good rows.
Please invest 2 hours in the basics and it will save you time:

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