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Re: Using Locators in Mathematica v6

• To: mathgroup at smc.vnet.net
• Subject: [mg76528] Re: Using Locators in Mathematica v6
• From: ragfield <ragfield at gmail.com>
• Date: Wed, 23 May 2007 05:36:05 -0400 (EDT)
• References: <f2u4tq$jv5$1@smc.vnet.net>

On May 22, 1:08 am, "Coleman, Mark" <Mark.Cole... at LibertyMutual.com>
wrote:
> Briefly, I want to illustrate the effects that outlier points an have on
> a line of best fit. For my example, I generate a small random set of
> points (x(i), y(i)), where y(i) = a + b x(i) + randomerror(i), for
> values a and b. I then calculate the line of best fit using Fit[ ]. I
> next ListPlot[ ] the underlying set of points and overlay the resulting
> line from Fit[ ]. So far very simple.
>
> In my dynamic example, I'd like to have a locator button appear on the
> graph such that the (x,y) location of the locator becomes an additional
> data point in the overall data set, and thereafter a new line of best
> fit is calcuated and displayed. Thus as the user moves the locator, a
> new best fit line is displayed.


Something like this?

http://demonstrations.wolfram.com/SimpleBestFitLine/

-Rob