RE: TGaxis::SetMaxDigits incorrectly operates on both X and Y axes

Yes you are right, The documentation is not right. SetMaxDigits is a global setting which applies on all the axis. I will update de doc according to the real behavior. What you are looking for is on the to-list about TGAxis: https://savannah.cern.ch/task/index.php?18777

-----Original Message-----
From: owner-roottalk_at_root.cern.ch [mailto:owner-roottalk_at_root.cern.ch] On Behalf Of Kevin Stenson
Sent: Saturday, January 22, 2011 3:05 AM To: roottalk_at_lxroot01.cern.ch
Subject: [ROOT] TGaxis::SetMaxDigits incorrectly operates on both X and Y axes

It seems that per this thread from 2004
http://root.cern.ch/cgi-bin/print_hit_bold.pl/root/roottalk/roottalk04/1 379.html
the TGaxis::SetMaxDigits function was only going to operate on the y axis for 1D histograms. This is also confirmed by the documentation for TGaxis::SetMaxDigits which states:
Static function to set fgMaxDigits for axis with the bin content   (y axis for 1-d histogram, z axis for 2-d histogram)

However, setting this function still seems to control both the x and y axes of a histogram. This is true in 5.22, 5.27, and 5.28. This can be seen with the following example:
TH1F* testhist = new TH1F("testhist", "testhist", 100, 1000.0, 1400.0); testhist->SetMaximum(1500);
TGaxis::SetMaxDigits(4);
testhist->Draw();
TGaxis::SetMaxDigits(3);
testhist->Draw();

The first draw shows the x and y axes without exponent scaling. The second draw shows both the x and y axes with exponent scaling. Can anyone tell me a way to get the x axis from the first Draw and the y axis from the second Draw? (Other than hacking up the postscript file).

Thanks for any help,

Kevin

-- 
Kevin Stenson,              Phone: 303-492-1106   FAX: 303-492-5119
Assistant Professor,        Email: kevin.stenson_at_colorado.edu
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