how to restrict sample for data analysis?

2019 1 23
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更新时间：2019 1 23
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Hello everyone!
I have to following problem: I use a .mat file for my data analysis and only want to include observations of males. I have a dummy variable that codes observation of males by 0, but I cannot find a solution to restrict my sample to males only.
My data set contains approximately 20 variables for each observation (=person).
I hope this information is sufficient.
Thanks for your help!

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Walter Roberson
Walter Roberson 2019-1-23

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mask = YourData(:, index_of_dummy_variable) == 0;
MaleData = YourData(mask, :);
The above assumes that the dummy variable is coded as a column of the data and that index_of_dummy_variable is the column number it is in.

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