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How do I do a logic check to see if one or more entries in an array is below a certain value?

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Kyle Reagan
Kyle Reagan 2017-6-16
回答： Adam 2017-6-16
I have a 2 column matrix, with the first column being dates and the second column being Fan Speed. I want to have a script search through the column and anytime it finds a fan speed below 8,000 it displays the date corresponding to from the first column. The fan speed is stored as Fan.data(:,2) and the dates are Fan.data(:,1). Can anyone help?

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Adam
Adam 2017-6-16
logicalIdx = Fan.data(:,2) < 8000;
dates = Fan.data(logicalIdx,1);

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