[ROOT] how to save and read a canvas

From: tcli (tcli@ic.sunysb.edu)
Date: Wed Jul 23 2003 - 04:55:50 MEST 

Dear root experts,
      I have problems in saving and reading a canvas. In a root session,
after plotting histograms in a canvas with data from a root-tuple, I
tried to save it in a directory (under which I opened the root session).
But there are many different types of files: ROOT files (.root), Macro
files (.C), PostScript (.ps), Encapsulated PostScript (.eps), SVG (.svg)
and Gif file (.gif). So what kind of file I should choose to save the
canvas? And how to read that file after saving? I tried saving it as a
ROOT file as xx.root, but I don't know how to read the file (to view it
as a canvas of histograms, I mean) in my directory.

Thanks in advances,
Lesley

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