Count a specific number in a set of attributes

Shubha

Hi,

I have a set of attributes and I need to create a new attribute which counts the number of zeros appearing in all the rows over the set of attributes.

I tried some like the below.

<operator name="Root" class="Process" expanded="yes">
    <operator name="ExampleSetGenerator" class="ExampleSetGenerator">
        <parameter key="target_function"	value="random"/>
        <parameter key="number_examples"	value="10"/>
    </operator>
    <operator name="Real2Integer" class="Real2Integer">
        <parameter key="round"	value="true"/>
    </operator>
    <operator name="AttributeAggregation" class="AttributeAggregation" breakpoints="before">
        <parameter key="attribute_name"	value="new"/>
        <parameter key="aggregation_attributes"	value="att.*"/>
        <parameter key="aggregation_function"	value="count"/>
    </operator>
</operator>

Though the AttrbuteAggregation operator has the COUNT function, it cannot count the occurance of a specific number over the set of attributes.

Thanks for your help,
Shubha

haddock

Hi Shubha,

Nice problem for regex folk! Does this do what you want? Haven't checked it thoroughly, but you get the idea..

<operator name="Root" class="Process" expanded="yes">
    <operator name="Set what you want to count" class="SingleMacroDefinition">
        <parameter key="macro"	value="Look_for"/>
        <parameter key="value"	value="-1"/>
    </operator>
    <operator name="ExampleSetGenerator" class="ExampleSetGenerator">
        <parameter key="target_function"	value="random"/>
        <parameter key="number_of_attributes"	value="10"/>
    </operator>
    <operator name="IdTagging" class="IdTagging">
    </operator>
    <operator name="Real2Integer" class="Real2Integer">
        <parameter key="round"	value="true"/>
    </operator>
    <operator name="IOStorer" class="IOStorer">
        <parameter key="name"	value="bla"/>
        <parameter key="io_object"	value="ExampleSet"/>
        <parameter key="remove_from_process"	value="false"/>
    </operator>
    <operator name="Numerical2Polynominal" class="Numerical2Polynominal">
    </operator>
    <operator name="Replace what you are counting with A" class="Replace">
        <parameter key="attributes"	value=".*"/>
        <parameter key="replace_what"	value="%{Look_for}"/>
        <parameter key="replace_by"	value="A"/>
    </operator>
    <operator name="Get rid of all else" class="Replace">
        <parameter key="attributes"	value=".*"/>
        <parameter key="replace_what"	value="A[0-9]+|-A|[-]*[0-9]+A|\-|[0-9]+"/>
    </operator>
    <operator name="Replace A with 1" class="Replace">
        <parameter key="attributes"	value=".*"/>
        <parameter key="replace_what"	value="A"/>
        <parameter key="replace_by"	value="1"/>
    </operator>
    <operator name="Add up the 1's" class="AttributeAggregation">
        <parameter key="attribute_name"	value="Count of %{Look_for}"/>
        <parameter key="aggregation_attributes"	value="att.*"/>
        <parameter key="aggregation_function"	value="count"/>
    </operator>
    <operator name="FeatureNameFilter" class="FeatureNameFilter">
        <parameter key="skip_features_with_name"	value="att.*"/>
    </operator>
    <operator name="IORetriever" class="IORetriever">
        <parameter key="name"	value="bla"/>
        <parameter key="io_object"	value="ExampleSet"/>
    </operator>
    <operator name="ExampleSetJoin" class="ExampleSetJoin">
        <parameter key="remove_double_attributes"	value="false"/>
    </operator>
</operator>

Good weekend to all!

PS Last edit I think covers most cases, also last version only worked on enterprise, as it used numerica2formattednominal, using numerica2polynominal seems to work OK.