pshistogram GMT4.5.11: strange results

Hi,

first my questions related to pshistogram: 
* Could there some influence of rounding and margins of the bins?
* Can I force 0.1 binning centered at 0.5, 0.6, 0,7 ... 1.5, 1.6, 1.7?
* Or more general: Can I define one margin of the first (or last) bin?


Background: Struggeling with pshistogram I created following script:

------- start test_pshistogram.sh ----------
pshistogram -Io -W0.1 -V <<END
1.7  
1.4  
0.9  
0.8  
0.8  
0.7  
0.7  
0.6  
0.5  
0.5  
0.5  
0.5  
END
-------  end test_pshistogram.sh  ----------

Calling this script I get:

$
$ ./test_pshistogram.sh 
pshistogram: 12 points read
pshistogram: WARNING: 12 multiple modes found
pshistogram: Extreme values of the data :	0.5	1.7
pshistogram: Locations: L2, L1, LMS; Scales: L2, L1, LMS	0.8	0.7	0.6	
0.381385035698	0.29652	0.14826

pshistogram: min/max values are :	0.5	1.7	0	5
0.5	5
0.6	2
0.8	2
0.9	1
1.3	1
1.6	1
$

The lines beginning with "pshistogram" fit my expections, but in the table of 
the last lines I would expect:

0.5 4
0.6 1
0.7 2
0.8 2
0.9 1
1.4 1
1.7 1

Playing with the Option -F the confusion increases. Adding "-F" I get

0.45	4
0.55	1
0.65	2
0.75	2
0.85	1
1.35	1
1.65	1

Despite of the offset of 0.05 this result looks better, but it isn't what I 
want. Should I add 0.05 to the first column?

Any hint is welcome!

Best Regards
Sigward Funke

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