Re: Plot problem in flair 1.1-3

From: nikhil shetty <>
Date: Tue, 23 Jul 2013 16:00:29 +0200

Hi Angelo,

in "logscale z", z is the value one is interested in and is plotted in
logarithmic (base 10) scale. If "logscale" is unset, then it is the linear
In your case, z corresponds to the values of dose and activity.

I remember myself having this problem of "data disappearance" when plotted
in log scale. After discussing with Vasilis, it was learnt that the problem
was with the version of gnuplot used (because flair uses gnuplot). Recent
versions of gnuplot has changed the way it used to handle log(zero), hence
the "data disappearance" problem.

There are atleast two solutions wrt to flair if one does not wish the data
to disappear:
1) Be happy with the linear scale :)
2) use older version of gnuplot (e.g. gnuplot 4.4 patchlevel 2) or
find/wait for the newer version of gnuplot which has resolved the problem.


On Sat, Jul 20, 2013 at 6:24 PM, Angelo Infantino <>wrote:

> Dear Fluka users, Dear Vasilis,
> I recently upgraded flair to version 1.1-3 but when I open some old
> simulation I have a strange behaviour:
> As you can see from the images attached, Resnuclei plot is blank when I
> know that it is not; furthermore, when I plot a polar userbin seems that a
> polar bin is not plotted.
> I saw, from the output window, that a command "set logscale z" is called.
> If I unset the logscale on z, everything return as I obtained with with my
> previous version of flair (1.0-0).
> Any other users have the same problem?
> Can someone explain me the meaning of the command "logscale z"?
> (expecially for the resnuclei plot since the logscale is already set in the
> color box)
> I run fluka/flair on Fedora 19 and gnuplot 4.6.1-6 is installed. Fluka
> version is 2011.2b.3. I notice the same problem on linux Mint 15.
> Thank you
> Angelo
> --
> Ing. Angelo Infantino, Ph.D. student
> Department of Industrial Engineering - Laboratory of Montecuccolino
> University of Bologna
> tel +39 051.2087.702; fax +39 051.2087.747
Received on Wed Jul 24 2013 - 09:48:57 CEST

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