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how to extract all rows with samen "Key" from matrix

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Simon Kant
Simon Kant 2022-6-29
评论： Simon Kant 2022-6-29
Hi all, I am trying to extract from a Large Matrix with almost 70000 elements all rows with the SOURCE_KEY (column 3 of the matrix) '1BY6WEcLGh8j5v7' so that only the values to the matching KEY remain.
Does anyone have any ideas?

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回答（1 个）

patrick1704
patrick1704 2022-6-29
Your SOURCE_KEY column is a categorical. Thus, you just have to do something like this:
reducedData = Electricity(Electricity.SOURCE_KEY == categorical({'1BY6WEcLGh8j5v7'}), :)

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