I have a general format datafile, with "X Y Z field0 field1" columns of data.

I want to feed this through glyph, using field0 to set the glyph size and
field1 to set the colour.

My script at present does:


File->Import->Glyph    ->Color->Image
            ->Colormap ->

I want to know how to specify the data column to use between Import & Glyph,
and again between Import & Colormap. The Mark module allows me to choose
"data", etc, but how do I choose which column of data?

Thanks,

  Brent Wood

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