[Gnuplot-info] Using histep in log mode

[John A. <Joh...@ma...>]

Dear gnuplot,

I am writing to suggest that for the histep verticals, gnuplot should =20=

use the halfway point calculated *before* taking logs.

I attach a plot of equally spaced data in 100 bins of 10 MeV.  The =20
first bin with content is the bin 10-20 MeV.  The lower vertical =20
should be halfway between 5 and 15 MeV, namely at 10 MeV, but gnuplot =20=

places it at the point halfway between ln(5) and ln(15), namely exp(ln=20=

(5) + (ln(15)-ln(5))/2) =3D 8.66.  Misleading.

As well as the plot I attach data and a file of gnuplot commands.

Regards,

John Allison


John Allison                   Tel: +44-1422-845624
Dept. of Physics & Astronomy   Mobile/Cell: +44-7810-242262
The Univ. of Manchester        Email: Joh...@ma...
MANCHESTER M13 9PL             Email(2): Joh...@3-...
UK                             WWW: http://www.hep.man.ac.uk/u/johna


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