Chaining Visitors #248
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Apologies for another question, but I could not see this in the Hello World example or documentation. I wanted to know if it is possible to chain visitors? For example, if I want to apply the rate of change visitor to a linear regression visitor result, how could I do that? The examples usually have a single visitor acting directly on a dataframe from what I can see. |
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I don't have the chaining interface because it is not as efficient in C++. But what you can do is in one call run the visitor and add its result as a new column in the DataFame load_result_as_column() (given the result of the algo is a vector). And then run the next visitor on the new column. |
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Thank you again! I've got it working by loading the result in a column as you had recommended, so one more blockage removed. I can see this requires a different way of designing software, but it is proving an experience. I am absolutely fine with these decisions if they improve efficiency, that is the main reason I am learning this library :-) |
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I don't have the chaining interface because it is not as efficient in C++. But what you can do is in one call run the visitor and add its result as a new column in the DataFame load_result_as_column() (given the result of the algo is a vector). And then run the next visitor on the new column.