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Tuesday, 7 May 2013

Built-in macros

There are a number of pre-defined macros that can be used within RapidMiner. I keep forgetting the details of these so I decided to write them down once and for all.

These do not show up in the macro view but it is possible to use them like other macros.

I copied the following text from the version 4.6 RapidMiner documentation...

%{a} is replaced by the number of times the operator was applied.
%{b} is replaced by the number of times the operator was applied plus one, i.e. %a + 1. This is a shortcut for %p[1].
%{p[number }] is replaced by the number of times the operator was applied plus the given number, i.e. %a + number. (note - this should be %{p[N]}
%{t} is replaced by the system time.
%{n} is replaced by the name of the operator.
%{c} is replaced by the class of the operator.
%{%} becomes %.
%{process_name} becomes the name of the process file (without path and extension).
%{process_file} becomes the name of the process file (with extension).
%{process_path} becomes the path of the process file.

I've tried these - I can't get %{p[n]} to work nor all the ones starting with "process_". No matter, the others work.

Here is a screenshot of a Generate Macro process that uses them.



Here is a screenshot of the results from the Macro view.



2 comments:

  1. Thanks for the list Andrew, %{a} have saved me some hours of work and a few gray hairs :)

    ReplyDelete