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Re: how to fit a dataset which consists of two parts with two different errors

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Op dinsdag 28 januari 2014 17:50:47 UTC+1 schreef Karl:
> Am 28.01.2014 14:20, schrieb hugocoolens@gmail.com:
> > 
> > I have to fit a dataset which consists of two parts: a part from 10e-6 to 1e-3
> > which has errorbars (0.01*0.033*$2+2e-9) and a second part from >1e-3 to 10e-3
> > which has errorbars (0.01*0.035*$2+600e-9)
> > 
> > Is it possible to give one fit command that uses the information here above
> > similar to the statement below but working for all the data?
> > 
> > 
> > fit f(x) 'mydata.dat' using ($1):($2):(0.01*0.035*$2+600e-9) via a,b
> > 
>
> You can use the ternary operator "a?b:c".
>
> error(x) = (x < 1e-3) ? (0.01*0.033*$2+2e-9) : (0.01*0.035*$2+600e-9)
>
> fit f(x) 'mydata.dat' using ($1):($2):(error($2)) via a,b
>
>
>  K
Thank you very much, this was exactly what I needed!
hugo

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how to fit a dataset which consists of two parts with two different errors "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2014-01-28 05:20 -0800
  Re: how to fit a dataset which consists of two parts with two different errors Karl <mail.kfr@gmx.net> - 2014-01-28 17:50 +0100
    Re: how to fit a dataset which consists of two parts with two different errors "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2014-01-30 22:46 -0800
    Re: how to fit a dataset which consists of two parts with two different errors "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2014-01-31 08:29 -0800
      Re: how to fit a dataset which consists of two parts with two different errors Karl <mail.kfr@gmx.net> - 2014-01-31 18:10 +0100
        Re: how to fit a dataset which consists of two parts with two different errors "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2014-02-01 00:40 -0800

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