Re: axis unit

From: Olivier Couet <Olivier.Couet_at_cern.ch>
Date: Thu, 8 Jun 2006 17:47:42 +0200 (CEST)

Hi,

 TGaxis allows to draw axis with labels mapped on a function. See attached example (from the manual).

O.Couet

> On Thu, 8 Jun 2006, OKUMURA, Akira wrote:
>
> > Hello ROOTers,
> >
> > I would like to change unit which is shown on an axis of a TGraph without
> > changing unit of input data.
> > I created a TGraph with data (wavelength VS QE), for example
> > # wavelength[m]QE
> > 3.0e-7 0.207
> > 3.2e-7 0.220
> > 3.4e-7 0.239
> > 3.6e-7 0.235
> >
> > If I draw the graph, X axis range will be [3.0e-7, 3.6e-7].
> > But I would like to change the unit from [m] to [nm].
> > If possible, new axis range will be [300, 360].
> >
> > Is there any simple solution ?
> > I would like to keep the internal data of TGraph in unit of [m].
> >
> > Sincerely,
> >
> > OKUMURA, Akira oxon_at_icrr.u-tokyo.ac.jp
> > Institute for Cosmic Ray Research, University of Tokyo
> > 5-1-5 Kashiwanoha Kashiwa Chiba 277-8582 Japan
> > Phone/Fax : +81 4-7136-3153
> > Skype : okumura.akira

-- 
Org:    CERN - European Laboratory for Particle Physics.
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E-Mail: Olivier.Couet_at_cern.ch                            Phone:   +41 22 7676522
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Received on Thu Jun 08 2006 - 17:47:50 MEST

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