Deleting specific values from multidimensional matrix

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

Answer 1

[Image Analyst]

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.

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