Compute Quantiles with JSL?

[#1]

I want to Compute a column quantiles, and copy the vaue to a variable! I have try it ,but i didn't success.  i need your help !

dt00=open("G:\JMP study\Diameter0329.jmp");

M=:"Diameter"<<Statistics( Quantiles( 10 ) );

what's the problem?

[#2]

JMP has a scripting index under the Help menu; I found the ColQuantile function looks promising:

dt = Open( "$sample_data\big class.jmp" );
m = Col Quantile( dt:height, 0.50 );

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