Workbook for BaBar Offline Users - Analysis in PAW II
Further use of PAW for BaBar physics analyses.
This workbook chapter follows on from the first Workbook section about analysis in PAW. In
this section you will learn how to set a default macros directory
and how to produce publication-read plots in PAW.
It is convenient to set up a directory to store general-purpose PAW
macros. This can be done by adding a line to the
.pawlogon.kumac file in your home directory. If you don't
have such a file, create one with the single line:
macro/default '.,~/pawmacros' -auto
This means that PAW will look for macros first in the current
directory (.), then in the directory ~/pawmacros.
While you're editing .pawlogon.kumac
, you should probably also add the line:
filecase keep
This command forces PAW to retain information about capitalisation in
all files it reads in and write out. Otherwise PAW tends to assume
that all filenames are given in lower-case characters - unlike unix.
You can also add the other command lines that are discussed in the
pawlogon section of PAW I.
So far all the macros we have used have been contained in a file with
the same name as the macro, and there has only been one macro per
file. You can actually have more than one macro defined in a given
file. To do this, you start each macro in the file with:
macro myfirstmacro
where myfirstmacro doesn't have to have the same name as the
file. You then place the macro code below this line in the usual way,
and you define the end of the macro with
return
Any code after this will be ignored until another macro is defined
with, say,
macro mysecondmacro
You should put a return at the end of your final macro in
your file also.
The macros are then executed from within a PAW session with
exec mymacrocollection#mysecondmacro
Where mymacrocollection is the name of the file
(i.e. mymacrocollection.kumac), and mysecondmacro is the name
of one of the macros defined in that file. We shall see several
examples of this in the sections below.
This section contains instructions for making attractive-looking
plots, with the BABAR logo, rather for publications and
presentations. There is one basic example and two complicated
ones. The complicated examples are intended primarily as a reference
so that the reader can see what else can be done.
You will need two general-purpose macros
- pub-plot.kumac - this kumac sets up
PAW with nice fonts and line widths and so forth, and is based on work
originally done by Gautier Hamel de Monchenault.
- makeps.kumac - writes a plot to a
postscript file
Put both of these in your ~/pawmacros directory.
Simple example
For each plot you will want to have a single macro that generates the
plot of interet. Here is one that makes a mass distribution of
Psi2s->mu+mu-: psi2smm-mass.kumac.
You will need the hbook file inclusive-fits-p52.hbook
There is not much to the kumac code. In this case, I find the defaults
put the left title a little too close to the axis number labels, so I
moved it a bit. Also, there is a bit of code to convert the ps file to
an eps file with no preview. PAW believes it can directly produce an
eps file, but I find that the bounding box is wrong.
Create the plot
[~/Work/text/temp]: paw
******************************************************
* *
* W E L C O M E to P A W *
* *
* Version 2.13/08 19 September 2002 *
* *
******************************************************
Workstation type (?=HELP) <CR>=1 :
Version 1.28/07 of HIGZ started
*** Using default PAWLOGON file "/Users/hearty/.pawlogon.kumac"
In private pawlogon.kumac.
PAW > exec pub-plot psi2smm-mass 1. 0.7
now calling psi2smm-mass.kumac
Postscript Output File = psi2smm-mass.ps
PAW >
The first argument passed to pub-plot is the name of the
macro that draws the specific plot. The other two arguments give the
size of the plot in x and y, where 1. = 15cm. This aspect ratio is
nice for PRL and PRD single-column figures.
Note that what you see on screen
psi2smm-mass-screen.tiff is not
the same as the final plot psi2smm-mass.eps which has the full
formatting with superscripts and Greek characters.
Note that if you want to include the BaBar logo in this plot, and
in the two examples below, you will need to include a line in the
kumac before the lines which create the images (the exec
makeps... command to call the babar macro
from within your plot macro.
Adding "BaBar" to your plot
To add the "BaBar" logo to the top-right corner of your
plot, you can use one of the macros defined in
pub-plot.kumac. After producing a plot in PAW, for
example by running the simple example below, you issue the command
exec pub-plot#babar
If you wish to change the position where the BaBar word appears and
the size of the word, you can pass three arguments when you execute
the babar macro. The defaults are 1. (scale), 68. (x-position) and
85. (y-position).
There's also a similar macro defined in pub-plot.kumac
for adding the word "PRELIMINARY" below "BABAR". It is run using the same
syntax as pub-plot#babar:
exec pub-plot#preliminary .5 58. 79.
where in this example, the defaults parameters are passed to the macro.
Here is a more complicated example from PRL 90 231801, projdata3.kumac.
In this case, we create an ntuple from an ascii list in the file, then
fill a 2D histogram from this ntuple. In this way, we get the exact
(mes, DeltaE) locations, instead of the PAW default,
which plots a random location within the histogram bin. We then create
projections of mes and DeltaE and plot those
as well. This is done for two different final states, giving six plots
in one figure.
To generate the plot, use the command:
exec pub-plot projdata3 1. 1.
The square aspect ratio (15cm by 15cm) is more appripriate in this
case. The resulting plot is here: projdata3.eps
Here is another example from the same paper pstarjpl.kumac.
In this case we read three p* plots from an hbook
file, then plot them beside each other. Run it using
exec pub-plot pstarjpl 1. 1.
You will need the hbook file pstarjpl.hbook.
General Related documents:
Author:
Chris Hearty
Last modification: 13 June 2005
Last significant update: 6 February 2004 (page created).
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