Changing data type of label

ml_guy

Hello everybody,

I am trying to change the data type from int to boolean of a CSV data source. When I apply Numerical2Binomial operator on the data, it converts the features but leaves the label. Thus I am unable to run Naive Bayes on it.

How can I change the data type of label to boolean (for classification tasks).

Thanks in advance.

earmijo

It's very simple. You can use AttributeSubsetPreprocessing

Suppose your data are:

label x1 x2
0 1 0.5
0 2 0.7
1 3 0.8
1 4 0.9


You can use the following code. Note that in the AttributeSubsetPreprocessing I've cheched "Process_Special_Attributes". Labels are special attributes.

<operator name="Root" class="Process" expanded="yes">
    <operator name="CSVExampleSource" class="CSVExampleSource">
        <parameter key="filename"	value="c:\data.csv"/>
        <parameter key="label_name"	value="label"/>
    </operator>
    <operator name="AttributeSubsetPreprocessing" class="AttributeSubsetPreprocessing" expanded="yes">
        <parameter key="condition_class"	value="attribute_name_filter"/>
        <parameter key="parameter_string"	value="label"/>
        <parameter key="attribute_name_regex"	value="label"/>
        <parameter key="process_special_attributes"	value="true"/>
        <operator name="Numerical2Binominal" class="Numerical2Binominal">
        </operator>
    </operator>
</operator>