My ROOT Libraries

• web access from ROOT scripts: w3.C
•  This file contains two fuctions: wget and wpost. The function wget can fetch a web page via GET method in http protocol, while the function wpost can post data to a web page via POST method.

Bool_t wget(TString& page, const char* host, const char* dir, Int_t port)
Bool_t wpost(TString& page, Int_t nkey, TString* keys, TString* values, const char* host, const char* dir, Int_t port)
usage:
root [0]  .L w3.C or #include "w3.C"
TString page;
wget(page, "hostname", "/html/index.html", 80);
// this is equivalent to 'http://hogename:80/html/index.html'
TString page, keys[1], values[1];
keys[0]="key"; value[0]="val";
wpost(page, "hostname", 1, keys, values, "/html/index.html", 80);

• make ntuple from text file: mkntpl.C
• This program makes root file contains ntuple from text file. The input text file which is specified by the first argument, cointains numbers delimitted by spaces or commas like sample.txt. The output file is ntpl.root. You can specify number of column by the second argument. If zero is specified as the second argument, the number of column is judged by the first line in the input file.

• Bool_t mkntpl(char* tfname, int ncol)

• usage: .x mkntpl.C("sample.txt", 0)
• Merge two or more root histogram into one: hmrg.C
  
• Each histogram file must contain the same histograms and ntuples in the same directory structure.
• Supported objects: TH1F, TH2F and TNtuple.
• All variables in TNtuple should be float type.
• Usage:
• Put these two files: hoge1.root hoge2.root : These were made by mk3pl4hmerge.C like .x mk3pl4hmerge("hoge1.root", 1111) .
• On ROOT prompt
• ].L hmrg.C+
• ]merge()