excelsource

Hi everyeone,
i want to make a roc chart with a excel source but i cant cause it's says a tag problem.
I got an excel file with 2 column named person and get money? so, muy question is, how can i resolve the tag problem and make rapid draw the roc curves?

and other thing about the plot of roc curve is this. I used the arff source with the titanic.arff.with this code
<operator name="Root" class="Process" expanded="yes">
    <operator name="ArffExampleSource" class="ArffExampleSource">
        <parameter key="data_file" value="C:\Facultad\Grupo investigacion\rm_workspace\sample\data\titanic.arff"/>
        <parameter key="label_attribute" value="survived"/>
    </operator>
    <operator name="DecisionTree" class="DecisionTree">
        <parameter key="keep_example_set" value="true"/>
    </operator>
    <operator name="ROCChart" class="ROCChart">
    </operator>
</operator>

in this case i could make the rapid draw the roc curve but i cant realize the meanning of the grafic, if someone can help me i tahnx a lot!!!!!

thanx, leo