Hello, If someone, please, could help me understand a couple of things; first, after creating a directory on a .root file, how to actually put a "file" in that directory (in a .C macro)? Let me clarify... i have a time series data that lands itself nicely to the idea of a directory structure, as follows; root_file:/type/date/time <- this file would contain the data, which consists of a mixture of strings and floats. This seemed like the simplest way to pursue, but hours of reading the HTML docs still wouldn't point me to a way to write out, be it as a structure, or a class, the actual data. So, for the time being, I ended up with a combination of directories and TTree files, as follows; root_file:/type/date <- TTree containing the rest of data but with this scheme I've ran into a problem as well. I create the file OK, but getting the data back eluded me so far. I can loop through all the directories, all the trees and the branches in them, but things either blow up when I try to read the leaves containing the actual data, or I get incorrect values. I expected to get the data through TLeaf-> GetValuePointer(), but it doesn't seem to be so. What am I missing here? This is all with a 2.03 version on NT. Thanks in advance, /Mariusz
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