[R] Fitting multiple horizontal lines to data

MacQueen, Don macqueen1 at llnl.gov
Thu Nov 7 02:43:18 CET 2013

Possibly see the

Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550

On 11/6/13 9:19 AM, "Sashikanth Chandrasekaran"
<sashikanth.chandrasekaran at gmail.com> wrote:

>I am not trying to fit a horizontal line at every unique value of y. I am
>trying fit the y values with as few horizontal lines by trading off the
>number of horizontal lines with the error. The actual problem I am trying
>to solve is to smooth data in a time series. Here is a realistic example
>An example fit for y using multiple horizontal lines (may not be the best
>fit in terms of squared error or another error metric, but I have included
>the y value for concreteness)
>1. A horizontal line at approximately y=140 (to fit the first 13 values -
>134.45 to 148.77)
>2. A horizontal line at approximately y=110 (to fit the next 7 values -
>71.64 to 111.64)
>3. A horizontal line at approximately y=150 (to fit the next 2 values -
>157.26 to 143.8)
>4. A horizontal line at approximately y=65 (to fit the last 8 values -
>40.19 to 64.99)
>	[[alternative HTML version deleted]]
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>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

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