Create a 1/2 diameter clear holes

<!-- 
Get All Round Pads on Layer Top, and create a 1/2 diameter clear holes.
 
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<NumericalMatrix >
 
   <!-- Define a reference Array -->
    <ADD ref="clear_circ" >
        <JOB>@active</JOB>
        <UNITS>INCH</UNITS>
        <COMPOSITE>101</COMPOSITE>
        <CIRCLE>@layer,@xx,@yy,{{@pad_width/2.0}}</CIRCLE>
        <MESSAGE>Clear {{@myobject}} #{{__index+1}}  X: @xx  Y: {{@yy}} New Hole Diameter: {{@pad_width/2.0}}</MESSAGE>
    </ADD>
    
    <!-- Select Top Layer Pads set -->
    <FILTER>
        <NAME>Filter_TOP</NAME>
        <JOB>@active</JOB>
        <LAYERS>[Top]</LAYERS>
        <OBJECTS>Pad</OBJECTS>
        <apertures>circle</apertures>
    </FILTER>
 
    <SELECTION>
        <Name>Set1</Name>
        <FILTER>Filter_TOP</FILTER>
        <JOB>@active</JOB>
        <SELECT_ALL/>
    </SELECTION>
 
    <foreach select="Set1">
        <get type="object" result="@myobject" />
        <get type="width" result="@pad_width" />
        <get type="x" result="@xx" />
        <get type="y" result="@yy" />       
        <get type="layer" result="@layer" />
        <matrix_ref name="clear_circ" />
    </foreach>
 
    <!-- Zoom Out to see edits -->
    <ZOOM_ALL />
 
</NumericalMatrix>