Define a slider control for a hidden column from a table.

[Marian Stan]

How can i define a slider control for a column from a table, hide that
column and then create a dashboard and draw the slider control with
the new table.

[ChartMan]

I am not sure I follow but you can use DataView to show/hide columns.

HTH
chartMan

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[asgallant]

See the playground Full Dashboard example's Pie Chart:  http://code.google.com/apis/ajax/playground/?type=visualization#full_dashboard

The 'view' option allows you to specify which DataTable columns are used in the view.  I believe (but am not 100% certain) that this works almost exactly like defining columns in a DataView, so you should be able to use calculated columns as well.