I would like to customize my distribution histogram by adding reference lines for +/- 3 sd but I can't figure out how to get the 'Std Dev' without entering it manually.
What I am looking for is a customization that can be pasted into many separate distribution plots.
Any suggustions would be most helpful. - Tim
One way to get column stats is with summarize():
dt = Open("$ENGLISH_SAMPLE_DATA/Big Class.jmp");
//Get column stats
avg = mean(:height)
siglow = avg - 3 * sigma;
sighigh = avg + 3 * sigma;
Continuous Distribution( Column( :height ), Count Axis( 1 ) ),
Min( 45 ), Max( 78), Inc( 5 ),Minor Ticks( 1 ),
Add Ref Line( eval(siglow), Dotted, "Black","-3sd" ),
Add Ref Line( eval(sighigh), Dotted, "Black","+3sd" )
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