Applying filter on some attributes in Weka
I'm trying to classify some data for a project using Weka. So I need use logarithmic transformation on a single attribute by y=ln(x+1). I use MathExpression filter and my expression is log(A+1). I want my filter to apply only on a single attribute, however it applies on all attributes. How can i apply filter only single attribute. Thanks in advance.
You can select the attributes to act on by filling in "ignore range" with a comma separated list of attribute indices.
ignoreRange -- Specify range of attributes to act on. This is a comma separated list of attribute indices, with "first" and "last" valid values. Specify an inclusive range with "-". E.g: "first-3,5,6-10,last".
This information can be found by clicking the "More" button in the GenericObjectEditor (example shown below).
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