[Andee Rubin]

I’d like to add a vertical moveable line to a graph to visualize all of the points above a particular (changeable) number.  I see on the Measure menu that there is “plotted value” and “moveable line” but I’m not sure how to use those.  Can someone explain?

[Bill Finzer]

Hi Andee,

I was disappointed to find that the movable line disappears when it is exactly vertical. Darn. I’ll log that as a bug. BTW a horizontal movable line works fine.

For a vertical line you can use a Slider and Plot Value. Your formula for the plotted value will simply be the name of the slider. Then you can drag the slider to change the position of the vertical line. Not as nice as direct manipulation, of course.

I’ve included a screen shot that shows both a vertical line with position determined by a slider, and a horizontal movable line that you can grab and move directly.

Bill

 

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   Vertical-and-Horizontal-Lines.png
   

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